{"title":"15%折扣","description":"","products":[{"product_id":"dual-analog-vu-meter-2-way-amplifier-speaker-audio-switcher-box-db-panel-display","title":"Douk Audio VU3 Dual Analog VU Meter 2-way Amplifier\/Speaker Audio Switcher Box DB Panel Display","description":"\u003c!-- x-tinymce\/html --\u003e\n\u003cdiv style=\"text-align: left;\" data-mce-fragment=\"1\" data-mce-style=\"text-align: left;\"\u003e\n\u003cdiv class=\"celwidget aplus-module 3p-module-b aplus-standard\" data-csa-c-id=\"bj2s6z-xhzx0i-aazc1-bwqy08\" data-cel-widget=\"aplus-3p-module-b\" cel_widget_id=\"aplus-3p-module-b\"\u003e\n\u003cdiv class=\"aplus-module-wrapper aplus-3p-fixed-width\"\u003e\n\u003cdiv class=\"celwidget aplus-module 3p-module-b aplus-standard\" data-csa-c-id=\"bj2s6z-xhzx0i-aazc1-bwqy08\" data-cel-widget=\"aplus-3p-module-b\" cel_widget_id=\"aplus-3p-module-b\"\u003e\n\u003cdiv class=\"aplus-module-wrapper aplus-3p-fixed-width\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"celwidget aplus-module module-2 aplus-standard\" data-csa-c-id=\"61kubu-j99bqt-ah6rqi-9vukc9\" data-cel-widget=\"aplus-module-2\" cel_widget_id=\"aplus-module-2\"\u003e\n\u003cdiv data-a-expander-name=\"aplus-module-expander\" data-a-expander-collapsed-height=\"700\" class=\"a-expander-collapsed-height a-row a-expander-container a-expander-partial-collapse-container\"\u003e\n\u003cdiv aria-expanded=\"false\" class=\"a-expander-content a-expander-partial-collapse-content\"\u003e\n\u003cdiv class=\"aplus-module-wrapper apm-floatnone apm-fixed-width\"\u003e\n\u003cdiv class=\"apm-sidemodule apm-spacing\"\u003e\n\u003cdiv class=\"apm-sidemodule-textright\"\u003e\n\u003ch3 class=\"a-spacing-mini\"\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cstrong\u003e\u003cbr\u003eFeatures\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cdiv id=\"pastingspan1\" data-mce-fragment=\"1\"\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eVU3 VU meter \u0026amp; audio switcher box is originally designed by Douk Audio:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cblockquote data-mce-fragment=\"1\"\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\n\u003cdiv style=\"text-align: left;\" id=\"pastingspan1\" data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eAs a VU meter, with dual 60*35mm large meter, can dynamically decorate audio environment and provide incomparably visual effects when switching audio signals.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\n\u003cdiv style=\"text-align: left;\" id=\"pastingspan1\" data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eAs an audio switcher, easily to switch between two amplifiers and 2 pair of speakers, no need to plug in and out cables repeatedly to avoid wearing the contact point of the sockets.\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/blockquote\u003e\n\u003cdiv style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cdiv id=\"pastingspan1\" data-mce-fragment=\"1\"\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePowerful design and strong compatibility: all channels adopt fully isolation design, each channel's GND is independent without mutual interference. Supports all kinds of amplifier such as BTL \/ class A \/ class B \/ class D digital amplifier \/ tube amplifier etc.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHigh-quality components to ensure VU3's best working performance:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cblockquote data-mce-fragment=\"1\"\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\n\u003cdiv style=\"text-align: left;\" id=\"pastingspan1\" data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e1. AC 250V 5A large current relay, easily to connect amplifiers and speakers with high power.\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cdiv id=\"pastingspan1\" data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e2. Built-in large power load resistor with metal wire winding, each channel supports up to 300W power input and output.\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cdiv id=\"pastingspan1\" data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e3. High-precision VU meter with peak LED display, and match perfectly with customized VU driver board.\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cdiv id=\"pastingspan1\" data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e4. Fully isolation transformer to acquisite audio signal to avoid crosstalk from VU driver board, ensure clear and pure sound.\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\n\u003cdiv style=\"text-align: left;\" id=\"pastingspan1\" data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e5. Solid CNC full aluminium alloy case, large pure copper banana speaker jacks ensures minimum signal attenuation during transmission.\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/blockquote\u003e\n\u003cdiv style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cdiv id=\"pastingspan1\" data-mce-fragment=\"1\"\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eEasy Use \u0026amp; Perfect Details: Powered by micro-USB 5V, with built-in protection load for speakers. With remote control, can quickly set the working status from distance. All settings can be saved after shutdown, more convenient to use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eProper size with exquisite appearance: cool black case, warm VU meter and clear indicators looks vintage and dynamic, can perfectly match with a variety of usage scenarios, very suitable for audiophiles who have more than one amplifiers or speakers.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\n\u003chr data-mce-fragment=\"1\"\u003e\n\u003cdiv style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\u003cstrong\u003eWarm tips\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-mce-fragment=\"1\"\u003eFor safer and faster delivery, the remote control may not include batteries (CR2025 3V), please prepare it by yourself.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eNot connect VU3 to amplifiers whose actual output power is greater than 300W, or else VU meter may be damaged.\u003c\/li\u003e\n\u003cli\u003eWhen power VU3 off, Amplifier B channel and Speaker 2 channel will be auto selected and can input and output audio signal normally. And when power VU3 on again, it will auto switch to the channels that are set before.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003chr data-mce-fragment=\"1\"\u003e\n\u003cdiv style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\u003cstrong\u003eParameters\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\" id=\"pastingspan1\" data-mce-fragment=\"1\"\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAudio input\/output: 2 groups of banana female\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWorking mode: 2-IN-1-OUT \/ 1-IN-2-OUT\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAmplifier type supported: all kinds of type (BTL \/Class A \/Class AB \/Class B \/ Class D digital amp \/ tube amp etc.)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eMax. through power of each channel: 300W (in actual)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eBacklight brightness adjustment: 4-level adjustment (can be turn off)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAmplifier no-load protection: support\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eRemote control function: supprt\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSettings saved after shutdown: support\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWorking voltage: DC 5V (above 1A)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePower interface: Type-C\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eBattery model of remote control: CR2025 3V (may not included)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDiameter of VU meter: 60*35mm\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eDimensions(W*D*H): 178*118*68mm \/ 7.01*4.65*2.68in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003ePackage dimensions(W*D*H): 280*185*155mm \/ 11.02*7.28*6.10in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eNet weight: 980g \/ 2.16lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003ePackage weight: 1.2kg \/ 2.65lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003chr data-mce-fragment=\"1\"\u003e\n\u003cdiv style=\"text-align: left;\" id=\"pastingspan1\" data-mce-fragment=\"1\"\u003e\u003cstrong\u003ePacking List\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv id=\"pastingspan1\" data-mce-fragment=\"1\"\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e1*VU3 VU Meter \u0026amp; Audio Switcher\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e1*Remote Control(without battery)\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e1*USB Cable\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e1*User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47406706295016,"sku":"XX-VU3-US","price":129.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47406706327784,"sku":"XX-VU3-UK","price":129.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47406706360552,"sku":"XX-VU3-DE","price":129.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47406706393320,"sku":"XX-VU3-AU","price":129.99,"currency_code":"USD","in_stock":true},{"title":"Other","offer_id":47406706426088,"sku":"XX-VU3","price":138.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/products\/XX-VU3_3.jpg?v=1650962469"},{"product_id":"douk-audio-dac-t1-pro-hifi-tube-stereo-preamp-usb-dac-bluetooth-receiver-s-pdif-d-a-audio-converter","title":"Douk Audio DAC-T1 PRO HiFi Tube Stereo Preamp USB DAC Bluetooth Receiver S\/PDIF D\/A Audio Converter","description":"\u003c!-- x-tinymce\/html --\u003e\n\u003cp style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eFeatures\u003c\/span\u003e\u003c\/p\u003e\n\u003cul style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eAmazing combination in appearance and functions: integrated DAC-T1-PRO DAC with retro tubes and modern OLED display into a whole, keep both strong vintage feelings and convenient use. Even in limited space, warm filament dynamically decorates the audio system and give you a wonderful acoustic enjoyment with large dynamic and sweet sound.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eWith multiple audio inputs and outputs: Bluetooth \/ PC-USB \/ coaxial \/ optical \/ RCA inputs, compatible with most audio sources such as phone, tablet, computer, digital player etc. \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003eWith stereo RCA and 3.5mm headphone jack outputs, can connect different amplifier \/ active speaker \/ headphones, HiFi music can be easily enjoyed.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eImported JAN5654 tubes and vintage warm sound: comes with JAN5654 tubes, greatly improves everything associated with your music, sounds soft and delicate, dynamic and pleasing. Easy to compare the difference between digital sound and tube sound via bypass function. Pluggable tube socket design, upgrade to 6*1N, 6AK5, EF95 etc. to enjoy tube sound of different styles.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eComplete design and perfect details: support treble and bass control, easy adjust one's own preferable sound styles. Besides large OLED display to indicate working status, also with full function remote control to achieve all settings. Powerful function with attractive appearance, very suitable for the audiophiles who pursue HiFi sound in limited space.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eHigh-end materials and unique structure are adopted to ensure better performance:\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eQCC5125 Bluetooth chip, supports ACC\/SBC\/APTX\/APTX-HD\/LDAC, achieves further distance and lossless signal transmission without delay.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eESS9028Q2M independent DAC chip, OPA1656 op amp, NJW1194 digital tone control chip, with larger dynamic range, lower distortion and higher resolution.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e9123 USB chip with special driver, support 24Bit\/192Khz transmission to improve the sound quality.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eClassic headphone amp architecture (2*NE5532),  provide larger output power enough to drive 300Ω headphones.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-mce-fragment=\"1\"\u003e\n\u003cp style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eParameters\u003c\/span\u003e\u003c\/p\u003e\n\u003cul style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eChip architecture: QCC5125 (Bluetooth chip) + 9123 (USB chip) +ESS9028Q2M (DAC chip) + NE5532 (amp)\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eAudio input: Bluetooth \/ PC-USB \/  Coaxial \/ Optical \/ Stereo RCA\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eAudio output: Stereo RCA \/ 3.5mm headphone jack\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eBluetooth  version: 5.0 (support APTX  \/APTX-HD \/ LDAC)\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eSampling rate supported:\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003ePC-USB: 24bit \/ 192KHz\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eCoaxial \/ Optical: 24bit \/ 192KHz\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003ePC-USB operation system supported: W7\/W8\/W10\/MAC\/Linux\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eFrequency response: 20Hz-20KHz (±0.5dB)\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eTHD: 0.08%\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eS\/N ratio: ≥110dB \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eTreble \/ Bass control: ± 6db\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eMatched headphone impedance: 16-300Ω\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eHeadphone output power: 150mW\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eOutput level: 2.4Vrms\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eWorking voltage: DC 12V\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eDimensions(W*D*H): 185*128*41mm \/ 7.28*5.04*1.61in\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eNet weight: 622g \/ 1.37lb\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003ePackage weight: 1.1kg \/ 2.43lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-mce-fragment=\"1\"\u003e\n\u003cp style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eWarm tips:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e1. For safer and faster delivery, the remote control may not include batteries (2*AAA), please prepare it by yourself.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e2. 3.5mm headphone jack output is prior, stereo RCA output will auto disconnect when headphone is inserted.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e3. PC-USB (systems below win10) input need special driver to get 24Bit\/192KHz transmission, please contact us for it when you receive DAC-T1 PRO. It also supports OTG functions, but Android system needs OTG cable and IOS system needs camera kit, please prepare by yourself. \u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-mce-fragment=\"1\"\u003e\n\u003cp style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003ePacking List\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003e1*DAC-T1 PRO DAC\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003e2*5654 Vacuum Tube\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003e1*DC 12V Power Adapter\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003e1*USB Cable\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003e1*Optical Cable\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003e1*Bluetooth Antenna\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003e1*Remote Control (without batteries)\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e1*User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47406944387304,"sku":"SUC-DAC-T1-PRO-US","price":169.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47406944420072,"sku":"SUC-DAC-T1-PRO-UK","price":169.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47406944452840,"sku":"SUC-DAC-T1-PRO-DE","price":169.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47406944485608,"sku":"SUC-DAC-T1-PRO-AU","price":169.99,"currency_code":"USD","in_stock":true},{"title":"Other","offer_id":47406944518376,"sku":"SUC-DAC-T1-PRO","price":179.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/products\/1_b67170da-2230-4e46-899b-42e24b3c5900.jpg?v=1654161296"},{"product_id":"nobsound-ns-14g-bluetooth-hifi-2-1-channel-power-amplifier-subwoofer-stereo-audio-amp","title":"Nobsound NS-14G Bluetooth HiFi 2.1 Channel Power Amplifier Subwoofer Stereo Audio Amp","description":"\u003c!-- x-tinymce\/html --\u003e\n\u003cp style=\"text-align: left;\" data-mce-fragment=\"1\"\u003eFeatures\u003c\/p\u003e\n\u003cul style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e2 kinds of audio input: support Bluetooth to achieve stable \u0026amp; high-speed transmission, with stereo RCA input, almost compatible with all home audio devices such as phones, tablets, computers, CD players etc..\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eClassic chips and 2.1 channel system: adopts TPA3116 chip, with AUX and speakers output, easy to build multi-channel system and the max output power can reach 50W*2(L\/R) and 100W(subwoofer).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePowerful design: besides input selector, also with abundant adjustable knobs to meet different listening needs, including main volume, treble and bass, subwoofer frequency and volume, even the balance of L\/R channel can be adjusted according to your preferences and enjoy music.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAttractive appearance: Mini size with elegant aluminum shell, black and red knobs design make it more fashionable, practical and powerful. DC 15-24V voltage, suitable for home and desktop audio system use and enjoy high-quality music.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-mce-fragment=\"1\"\u003e\n\u003cp style=\"text-align: left;\" data-mce-fragment=\"1\"\u003eParameters\u003c\/p\u003e\n\u003cul style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAudio input: Bluetooth\/Stereo RCA\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAudio output: AUX\/Banana speaker jacks\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eNumber of channels: 2.1\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eMax output power: 50W*2(L\/R channel)+100W(subwoofer)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSpeaker impedance: 4-8Ω(L\/R)\u003cbr data-mce-fragment=\"1\"\u003e                                 2-8Ω(subwoofer)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eTreble and bass adjustment range: ±6dB\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAUX max output level: 1.2V\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eBass cutoff frequency: 40-120Hz\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eInput sensitivity: 0.775V\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFrequency response: 20Hz-20KHz(±2dB)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eTHD: 0.07%(1kHz)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSNR: ≥92dB\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWorking voltage: DC 15-24V\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePackage dimensions(W*D*H): 133*125*36mm \/ 5.24*4.92*1.42in\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eNet weight: 580g \/ 1.28lb\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePackage weight: 1.2kg \/ 2.65lb\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-mce-fragment=\"1\"\u003e\n\u003cp style=\"text-align: left;\" data-mce-fragment=\"1\"\u003ePacking List\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e1× NS-14G Power Amplifier\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e1× 24V\/4.5A Power Supply\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" data-mce-fragment=\"1\"\u003e1× Bluetooth Antenna\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47198661443816,"sku":"SUC-NS-14G-24V-US","price":99.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47406939701480,"sku":"SUC-NS-14G-24V-UK","price":99.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47406939734248,"sku":"SUC-NS-14G-24V-DE","price":99.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47406939767016,"sku":"SUC-NS-14G-24V-AU","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Other","offer_id":47406939799784,"sku":"SUC-NS-14G-24V","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/SUC-NS-14G_4.jpg?v=1690270229"},{"product_id":"douk-audio-t9-hifi-magic-6e2-vacuum-tube-stereo-preamp-mm-mc-phono-stage-for-turntable-amp","title":"Douk Audio T9 6E2 Vacuum Tube Preamp MM\/MC Phono","description":"\u003cdiv style=\"text-align: left;\"\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eWarm Tips\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e1. The bias and gain of two 6E2 tubes are set well before shipping, please pay attention to the R\/L channel markings on the tubes, don't insert them wrongly during installation.\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e2. 3.5mm headphone jack with priority, please make sure the headphone has been disconnected if you want RCA output.\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e3. Pluggable tube socket design, 6A2 is convenient to be replaced by 6K4, EF93, 6BA6, W727 etc. to enjoy tube sound of different styles.\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e4. T9 is a preamp not a power amplifier, needed to work with amplifiers or active speakers.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eFeatures\u003c\/span\u003e\u003c\/p\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eVintage vacuum tubes to provide double enjoyments: add magic eye 6E2 tubes to show the signal level dynamically, the color is pure with high brightness, also with switchable cold green and warm orange backlights, wonderful visual feast can be attained; default 6A2 tubes to improves everything associated with music, sounds warm and natural, full and mellow, amazing auditory carnival for your ears.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eT9 tube preamp with Phono and RCA inputs:\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003ePhono input, support both MM \/MC cartridges with one button to switch, convert phono signal to line level signal, low-noise integrated circuits and high-quality components to ensure clear sound.\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eStereo L\/R RCA input, amplify the low level audio signal from your phone, tablet, PC, MP3 etc., easier to drive amplifiers or active speakers and greatly improve their sound quality.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e3.5mm headphone output and tone control: besides stereo RCA output also with independent 3.5 mm headphone amp circuit, easily to drive all 16-300Ω headphones. More delicate and smooth sound with rousing highs and deep lows can be enjoyed by adjusting the treble \/ bass knob, rejuvenating your audio system.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eAttractive looking and powerful design: all metal case and CNC aluminum panel with good shielding performance to avoid external interference. Solid and durable knurled knob, all I\/O interfaces are gold-plated to ensure the tight and smooth transmission of the original audio signal to minimize the loss of the signal.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eHow to Adjust the Bias and Gain of the 6E2 Tubes?\u003cbr\u003e1. Power on T9 and do not input any source signal;\u003cbr\u003e2. Adjust the BIAS to display the green light of the 6E2 tube at the bottom;\u003cbr\u003e3. Then input the audio signal, and adjust the GAIN to display the 6E2 in the appropriate position and balance left and right.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eParameters\u003c\/span\u003e\u003c\/p\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eAudio input: Stereo RCA \/ Phono MM(MC)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eAudio output: Stereo RCA \/ 3.5mm Headphone Jack\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eHeadphone impedance range: 16-300Ω\u003c\/span\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eHeadphone output power:\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"padding-left: 40px; text-align: left;\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e250mW@32Ω\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e100mW@64Ω\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e60mW@128Ω\u003c\/span\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eRCA IN: \u003c\/span\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"padding-left: 40px; text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eInput level: 0.775V RMS\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 40px; text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eOutput level: 1.5V RMS\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 40px; text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eInput impedance: 100K ohm\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 40px; text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eSNR: ≥106dB \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 40px; text-align: left;\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eFrequency response: 20Hz-20KHz (±0.5dB) \u003c\/span\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003ePHONO IN:\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"padding-left: 40px; text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eInput level: 0.005V RMS (MM) \/ 0.0005V RMS (MC)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 40px; text-align: left;\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eOutput level: 0.6V RMS\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"font-family: times new roman, times;\"\u003e\u003cspan style=\"font-size: 18.6667px;\"\u003eInput impedance: \u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e47K ohm \u003c\/span\u003e(MM) \/ 330ohm (MC)\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 40px; text-align: left;\"\u003e\u003cspan style=\"font-family: times new roman, times;\"\u003e\u003cspan style=\"font-size: 18.6667px;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eSNR: ≥80dB\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 40px; text-align: left;\"\u003e\u003cspan style=\"font-family: times new roman, times;\"\u003e\u003cspan style=\"font-size: 18.6667px;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eFrequency response: Ref to RIAA ±2dB \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eTHD: ≤0.1%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eTube: 2×6E2; 2×6A2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eTreble\u0026amp;Bass: ±10dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eBacklight Color adjustable: GREEN\/ORANGE\/OFF\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eWorking voltage: DC 12V(≥1A)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eDimensions (W*D*H): 154*87*47mm \/ 6.06*3.43*1.85in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003ePackage dimensions(W*D*H): 210*190*100mm \/ 8.27*7.48*3.94in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eNet weight: 600g\/1.32lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003ePackage weight: 1.0kg\/2.20lb\u003c\/span\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003chr\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003ePacking List\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e1*T9 Preamp\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e2*6E2 Tube\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e2*6A2 Tube\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e1*DC12V Power Supply\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e1*Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"doukaudio","offers":[{"title":"US","offer_id":47406688403688,"sku":"XX-T9-US","price":134.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47406688436456,"sku":"XX-T9-UK","price":134.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47406688469224,"sku":"XX-T9-DE","price":134.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47406688501992,"sku":"XX-T9-AU","price":134.99,"currency_code":"USD","in_stock":true},{"title":"Other","offer_id":47406688534760,"sku":"XX-T9","price":134.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/XX-T9_1.jpg?v=1781684472"},{"product_id":"douk-audio-dac-q11-hifi-ess9038-akm4493-usb-dac-audio-adapter-coax-opt-d-a-converter-dsd256","title":"Douk Audio DAC-Q11 HiFi ESS9038Q2M+AK4493 USB DAC Audio Adapter COAX\/OPT D\/A Converter DSD256","description":"\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eWarm tips:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e1. For safer and faster delivery, the remote control may not include batteries (2*AAA), please prepare it by yourself.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e2. For Win7, PC-USB can only be recognized when the driver is installed. For other systems, the driver is only required when playing DSD files.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e3. 2 groups of Stereo RCA and 3.5mm AUX output can work at the same time, and the volume of the outputs is controlled simultaneously.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e4. There are 3 working modes with 2 different sound effects, supporting simultaneous output of AK4493 or ESS9038Q2M to groups 1 and 2, or AK4493 output to group 1 and ESS9038Q2M output to group 2.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eFeatures\u003c\/span\u003e\u003c\/p\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eSwitchable dual DAC chips: Pioneering the world's first DAC chip switching technology, backed by a proprietary patent, adopts 2pcs of DAC chips – ESS9038Q2M and AK4493. The groundbreaking design enables users to enjoy the robust dynamics of the ESS9038Q2M or the refined tones of the AK4493, vastly enhancing personalized audio experiences and pioneering new frontiers in the HiFi realm. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eHigh-performance: Offering an exceptional SNR (≥117dB) and ultra-low THD of 0.0003%, ensuring the high-quality conversion of audio signals. PC-USB input supports 32Bit\/384kHz transmission and DSD256 playback, suitable for users who pursue ultimate sound quality.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eMultiple inputs and outputs: Support Optical, Coaxial, and PC-USB inputs, compatible with audio sources such as mobile phones, computers, and digital players. With 2 sets of RCA and 2 sets of AUX outputs, providing users with a wide range of connection options, facilitating integration with various audio sources and playback devices, and adapting to different usage scenarios.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eDual OLED display \u0026amp; Large volume knob: 2 PCS of OLED screens can display real-time sampling rates, volume levels, and decoding chip statuses, enhancing user convenience. Designed with an easy-to-use large-sized volume control knob, ensuring that users can make delicate and precise volume adjustments to meet personalized listening preferences.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eExquisite and charming appearance: The top is designed with a glass window, showcasing the internal structure and augmenting visual effects. Equipped with remote control for easier operation; adopting CNC technology for integrated molding, combined with anodizing process treatment, meets modern aesthetics and a commitment to premium quality.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eParameters\u003c\/span\u003e\u003c\/p\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eAudio input: PC-USB \/  Coaxial \/ Optical\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eAudio output: 2 groups of Stereo RCA \/ 2 groups of AUX\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eDAC chips: ESS9038Q2M+AK4493\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eMax sampling rate supported:\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003ePC-USB: PCM 32bit \/ 384KHz DSD256\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eCoaxial \/ Optical: 24bit \/ 192KHz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003ePC-USB operation system supported: \u003cspan\u003eWindows \u003c\/span\u003e\u003cspan\u003e10\/11\u003c\/span\u003e\u003cspan\u003e, macOS, and mobile devices\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eFrequency response: 20Hz-20KHz (±0.3dB)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eTHD+N: 0.0003%@1kHz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eSNR: ≥117dB \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eRated output level: \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"padding-left: 40px; text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eAK4493:1.8V\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 40px; text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eESS9038Q2M:2V\u003c\/span\u003e\u003c\/div\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eWorking voltage: DC 12V≥1.5A\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eDimensions(W*D*H): 155*125*42mm \/ 6.10*4.92*1.65in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eNet weight: 590 \/ 1.30lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003ePackage weight: 1.10kg \/ 2.43lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003ePacking List\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e1*DAC-Q11\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e1*DC12V Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e1*USB Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e1*Optical Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e1*Remote Control (without batteries)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e1*User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47406446346472,"sku":"SUC-DAC-Q11-US","price":149.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47406446379240,"sku":"SUC-DAC-Q11-UK","price":149.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47406446412008,"sku":"SUC-DAC-Q11-DE","price":149.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47406446444776,"sku":"SUC-DAC-Q11-AU","price":149.99,"currency_code":"USD","in_stock":true},{"title":"Other","offer_id":47406446477544,"sku":"SUC-DAC-Q11","price":159.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/SUC-DAC-Q11_1.jpg?v=1719385937"},{"product_id":"douk-audio-vu3pro-amplifier-speaker-selector-vu-meter-2-in-2-out-switcher-box","title":"Douk Audio VU3PRO Amplifier\/Speaker Selector VU Meter 2-IN-2-OUT Switcher Box","description":"\u003cdiv style=\"text-align: left;\"\u003e\u003cspan\u003eNote: Only the yellow VU meter version is available currently, the blue version is coming soon.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003chr\u003e\n\u003cspan\u003eFeatures\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan\u003eVU3 Pro Amplifier\/Speaker Selector: The fully upgraded version of VU3, with great improvements in size, functions and performance. 2-IN-2-OUT (Two groups of speaker jacks support output at the same time), flexible to switch and make a comparison between 2 amplifiers and 2 pairs of speakers, no need to plug in and out cables repeatedly to avoid wearing the contact point of the sockets.\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan\u003eMax. 350W Power Transmission and Super Compatibility: With the growing popularity of high-power amplifiers, the power requirements for switchers have also increased. With a maximum pass-through of 350W, the VU3Pro supports various types of high-power digital and tube amplifiers (BTL, Class A, Class B, Class AB, Class D, etc.), including 300W TPA3255 amps and floorstanding speakers.  \u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan\u003eCustom-made Large and High-playability VU Meters: The VU3Pro features dual large VU meters and a bigger chassis, perfectly compatible with more audio devices in size. It offers 35 backlight colors and 5 brightness levels to suit various scenarios. Additionally, it supports 20 levels of gain and 30 levels of sensitivity adjustments, ensuring perfect alignment with different audio signals and allowing you to enjoy the vibrant audio-visual feast. \u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan\u003eWired\/Wireless Inputs and Easy to Use: VU3Pro adds mic pickup, just put it near your audio system, clear indicators in two warm and vintage VU meters will strikingly show every beat of music and dynamically activate your audio feast. With a button and remote control, effortlessly switch most settings at your fingertips and simplify the process of A\/B comparison, and all settings will be saved after shutdown.\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\u003cspan\u003ePremium Components for the Purest Sound Quality: VU3Pro integrates AC 250V 5A large current relay, isolated and high precision HL current sensor, built-in high-power load resistors to protect class A tube amplifier from damage when no load, solid CNC aluminium alloy panel and metal chassis, large pure copper speaker jacks etc., ensures virtually no impact or loss in sound quality and allows you to enjoy the purest high-fidelity sound.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003eWarm tips\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e1. Two groups of Speaker 1 and Speaker 2 can output at the same time.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e2.  The VU meters won't work normally if the speakers output of VU3Pro isn't connected to the speakers. If you only want the VU meters function, please choose MIC input.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e3. Don't connect VU3PRO to amplifiers whose actual output power is greater than 350W, otherwise the VU meters may be damaged.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e4. For safer and faster delivery, the remote control may not include batteries (AAA*2), please prepare it yourself.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003eComparision between VU3 and VU3Pro\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable style=\"margin-left: 0px; margin-right: auto; width: 100.062%;\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 58.5992%;\"\u003eItem\u003c\/td\u003e\n\u003ctd style=\"width: 1.81818%;\"\u003eVU3Pro\u003c\/td\u003e\n\u003ctd style=\"width: 38.9316%;\"\u003e\u003cspan\u003eVU3\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 58.5992%;\"\u003eSize of VU Meter\u003c\/td\u003e\n\u003ctd style=\"width: 1.81818%;\"\u003e85*45mm\/3.35*1.77in\u003c\/td\u003e\n\u003ctd style=\"width: 38.9316%;\"\u003e\u003cspan\u003e60*35mm\/2.36*1.38in\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 58.5992%;\"\u003eDimensions of Chassis\u003c\/td\u003e\n\u003ctd style=\"width: 1.81818%;\"\u003e268*155*75mm\/10.55*6.10*2.95in \u003c\/td\u003e\n\u003ctd style=\"width: 38.9316%;\"\u003e\u003cspan\u003e178*118*68mm\/7.01*4.65*2.68in \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 58.5992%;\"\u003eMIC Input\u003c\/td\u003e\n\u003ctd style=\"width: 1.81818%;\"\u003eSupport\u003c\/td\u003e\n\u003ctd style=\"width: 38.9316%;\"\u003e\u003cspan\u003e×\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 58.5992%;\"\u003e\u003cspan\u003eSimultaneous Output\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 1.81818%;\"\u003eSupport\u003c\/td\u003e\n\u003ctd style=\"width: 38.9316%;\"\u003e\u003cspan\u003e×\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 58.5992%;\"\u003e\u003cspan\u003eSeparate Gain Adjustment\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 1.81818%;\"\u003e20-level\u003c\/td\u003e\n\u003ctd style=\"width: 38.9316%;\"\u003e\u003cspan\u003e×\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 58.5992%;\"\u003e\u003cspan\u003eSeparate Sensitivity Adjustment\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 1.81818%;\"\u003e30-level\u003c\/td\u003e\n\u003ctd style=\"width: 38.9316%;\"\u003e\u003cspan\u003e×\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 58.5992%;\"\u003e\u003cspan\u003eBacklight Color Adjustment\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 1.81818%;\"\u003e35 kinds\u003c\/td\u003e\n\u003ctd style=\"width: 38.9316%;\"\u003e\u003cspan\u003e×\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 58.5992%;\"\u003e\u003cspan\u003eBacklight Brightness Adjustment \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 1.81818%;\"\u003e5-level\u003c\/td\u003e\n\u003ctd style=\"width: 38.9316%;\"\u003e\u003cspan\u003e4-level\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 58.5992%;\"\u003e\u003cspan\u003eMax. Pass-through Power\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 1.81818%;\"\u003e350W\u003c\/td\u003e\n\u003ctd style=\"width: 38.9316%;\"\u003e\u003cspan\u003e300W\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 58.5992%;\"\u003e\u003cspan\u003eUSB 5V Power Adapter\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 1.81818%;\"\u003eIncluded\u003c\/td\u003e\n\u003ctd style=\"width: 38.9316%;\"\u003e\u003cspan\u003e×\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/p\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\n\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eModel: VU3Pro\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eDiameter of VU meter: 85*45mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eAudio input\/output: 2 groups of banana female\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eWorking mode: 2-IN-2-OUT\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eMax. through power of each channel supported (in acutal):\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003cspan\u003e350W@4Ω\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003cspan\u003e200W@2Ω\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003e\n\u003cspan\u003eAmplifier type supported: all kinds of types (BTL\/Class A\/Class B\/Class D digital amp\/tube amp)\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eAmplifier no-load protection: support\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eFrequency response: 30Hz-20kHz\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eBacklight color: 35 kinds of color selection or automatic change\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eBacklight brightness: 5 levels (Off-30%-50%-80%-100%)\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eGAIN: 20 levels\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eSensitivity: 30 levels\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eMIC pick-up: support\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eRemote control: support\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eSettings saved after shutdown: support\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eWorking voltage: DC 5V ≥2A\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003ePower interface: Type-C\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eDimensions (W*D*H): 268*155*75mm \/ 10.55*6.10*2.95in\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003ePackage dimensions (W*D*H): 380*220*95mm \/ 14.96*8.66*3.74in\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eNet weight: 1.61kg \/ 3.55lb\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003ePackage weight: 2.00kg \/ 4.41lb\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003ePacking List：\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"text-align: left;\"\u003e\n\u003cspan\u003e1*VU3Pro\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003e\n\u003cspan\u003e1*Power Adapter\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003e\n\u003cspan\u003e1*Remote Control (without battery)\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"text-align: left;\"\u003e\u003cspan\u003e1*USB Cable(type-c)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"Yellow \/ US","offer_id":46655169954024,"sku":"XX-VU3-PRO-L-US","price":154.99,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ UK","offer_id":47406396571880,"sku":"XX-VU3-PRO-L-UK","price":154.99,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ EU","offer_id":47406396604648,"sku":"XX-VU3-PRO-L-DE","price":154.99,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ AU","offer_id":47406396637416,"sku":"XX-VU3-PRO-L-AU","price":154.99,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ Other","offer_id":47406396670184,"sku":"XX-VU3-PRO-L","price":154.99,"currency_code":"USD","in_stock":true},{"title":"Blue \/ US","offer_id":46655169986792,"sku":"XX-VU3-PRO-B-US","price":149.99,"currency_code":"USD","in_stock":false},{"title":"Blue \/ UK","offer_id":47406396702952,"sku":"XX-VU3-PRO-B-UK","price":149.99,"currency_code":"USD","in_stock":false},{"title":"Blue \/ EU","offer_id":47406396735720,"sku":"XX-VU3-PRO-B-DE","price":149.99,"currency_code":"USD","in_stock":false},{"title":"Blue \/ AU","offer_id":47406396768488,"sku":"XX-VU3-PRO-B-AU","price":149.99,"currency_code":"USD","in_stock":false},{"title":"Blue \/ Other","offer_id":47406396801256,"sku":"XX-VU3-PRO-B","price":159.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/XX-VU3PRO_1.jpg?v=1724806976"},{"product_id":"douk-audio-u2-pro-xmos-xu316-digital-interface","title":"Douk Audio U2 PRO XMOS XU316 Digital Interface DDC Reclocker","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eUnlock Pristine Lossless Audio: Easily convert the USB signal from your PC, Mac, phone or Raspberry Pi etc. into clean and simultaneous outputs of Optical, Coaxial and I2S. Feed a clear, stable, and jitter-free digital signal to those classic DACs, amplifiers and AV receivers without USB input for an immediate sound quality upgrade. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eUltra-high Resolution with XMOS XU316: Equipped with the latest XMOS XU316 chip asynchronous transmission, the U2 PRO ensures virtually no latency, stable signal transmission, and exceptional sound clarity. Supports PCM up to 32bit\/768kHz and DSD512, perfect for high-end music streaming and professional audio playback.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eStrong Compatibility via UAC Mode Switch: Specially designed with a UAC mode switch, the 1.0 mode offers plug-and-play, driver-free compatibility for gaming consoles like PS4, PS5 and Switch, while 2.0 mode enables high-resolution audio support for advanced playback needs.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eExpandable Oscillator Design: With ample internal space to accommodate compatible crystal oscillators, the U2 PRO lets audiophiles and DIYers freely upgrade their preferred high-precision clock to further reduce jitter and achieve an even higher level of sonic performance and system synergy. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCompact Size with Convenient Indicators: Pocket-sized and USB-powered, the U2 PRO includes a USB-C to USB-A\/C cable for broad device compatibility—truly plug and play. Real-time PCM\/DSD indicators make it easy to monitor sample rates and formats. A simple yet powerful upgrade for audiophiles, gamers alike.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eWarm tips\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan\u003e1. The U2 PRO supports Windows 10\/11, macOS, Android, and iOS. Windows 10 and above can run driver-free for PCM playback up to 384kHz, but higher sampling rate and DSD playback requires driver installation. macOS works driver-free. To avoid potential compatibility issues, it is not recommended to use Windows 7\/8, or general-purpose Linux systems. Linux-based audio systems like Daphile, Volumio, and ROON are supported.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e2. The U2 PRO supports oscillator replacement (not pluggable, needs soldering). Default 24.000 MHz ±20 PPM 5032 active oscillator, can be replaced by DIP-4P rectangular plug-in active oscillators or 5030 SMD active oscillators.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e3. The U2 PRO only supports 2.0 channel stereo audio. Multichannel formats such as 5.1, 7.1, or Dolby formats are not supported.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e4. Please install the required driver and files from the included USB drive, and follow the instructions or video guide to set up your player properly.  \u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: U2 PRO\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: USB Type-C\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: Coaxial\/Optical\/HDMI-IIS\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUSB chip: XMOS XU316\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput mode switch: UAC 1.0\/UAC 2.0\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax. sampling rate Coaxial\/Optical supported:\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cspan\u003ePCM：44.1kHz-192kHz\/16Bit-24Bit\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eDSD：DOP DSD64\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMax. sampling rate IIS supported:\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePCM：44.1kHz-768kHz\/16Bit-32Bit\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eDSD (Native): 64-512\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eDSD (DOP): 64-256\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eOperation systems PC-USB supported: W10\/W11\/Mac OS\/Android\/iOS\/PS5\/Switch\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eJitter: 75ps (typical)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTHD+N: 0.000008%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWorking voltage: DC 5V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 85*79*26mm \/ 3.35*3.11*1.02in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage dimensions (W*D*H): 195*155*70mm \/ 7.68*6.10*2.64in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 220g \/ 0.44lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight: 400g \/ 0.88lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking list\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* U2 PRO Digital Interface\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Optical Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* USB-C to USB-A\/USB-C Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US \/ Standard version","offer_id":47431035650280,"sku":"SUC-U2-PRO-US","price":69.99,"currency_code":"USD","in_stock":true},{"title":"US \/ TXCO Version","offer_id":47786743693544,"sku":"SUC-U2-PRO-TXCO-US","price":99.99,"currency_code":"USD","in_stock":false},{"title":"US \/ Femtosecond Version","offer_id":47786743726312,"sku":"SUC-U2-PRO-FS-US","price":199.99,"currency_code":"USD","in_stock":false},{"title":"UK \/ Standard version","offer_id":47431035683048,"sku":"SUC-U2-PRO-UK","price":69.99,"currency_code":"USD","in_stock":true},{"title":"UK \/ TXCO Version","offer_id":47786743759080,"sku":"SUC-U2-PRO-TXCO-UK","price":99.99,"currency_code":"USD","in_stock":false},{"title":"UK \/ Femtosecond Version","offer_id":47786743791848,"sku":"SUC-U2-PRO-FS-UK","price":199.99,"currency_code":"USD","in_stock":false},{"title":"EU \/ Standard version","offer_id":47431035715816,"sku":"SUC-U2-PRO-DE","price":69.99,"currency_code":"USD","in_stock":true},{"title":"EU \/ TXCO Version","offer_id":47786743824616,"sku":"SUC-U2-PRO-TXCO-DE","price":99.99,"currency_code":"USD","in_stock":false},{"title":"EU \/ Femtosecond Version","offer_id":47786743857384,"sku":"SUC-U2-PRO-FS-DE","price":199.99,"currency_code":"USD","in_stock":false},{"title":"AU \/ Standard version","offer_id":47431035748584,"sku":"SUC-U2-PRO-AU","price":69.99,"currency_code":"USD","in_stock":true},{"title":"AU \/ TXCO Version","offer_id":47786743890152,"sku":"SUC-U2-PRO-TXCO-AU","price":99.99,"currency_code":"USD","in_stock":false},{"title":"AU \/ Femtosecond Version","offer_id":47786743922920,"sku":"SUC-U2-PRO-FS-AU","price":199.99,"currency_code":"USD","in_stock":false},{"title":"China \/ Standard version","offer_id":47431035781352,"sku":"SUC-U2-PRO","price":69.99,"currency_code":"USD","in_stock":true},{"title":"China \/ TXCO Version","offer_id":47786743955688,"sku":"SUC-U2-PRO-TXCO","price":99.99,"currency_code":"USD","in_stock":false},{"title":"China \/ Femtosecond Version","offer_id":47786743988456,"sku":"SUC-U2-PRO-FS","price":199.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_b09c96fb-3537-4221-a5f9-51757a5cb535.jpg?v=1750412102"},{"product_id":"douk-audio-p7-hifi-tube-phono-preamp-with-hpf-stereo-audio-pre-amplifier-1","title":"Douk Audio P7 HiFi Tube Phono Preamp with HPF Stereo Audio Pre-Amplifier","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMM Phono\/RCA Input Flexibility: Serves as both a phono preamp and tube preamp, P7 is perfect for connecting turntables, phones, TVs, CD players etc. The P7 enhances sound clarity while adding a warm tone, bringing out every detail in your favorite music.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eXLR Output for Pristine Audio: Besides standard RCA, the P7 features a true balanced XLR output, reducing noise and improving dynamic range. Perfect for amplifiers and active speakers, it delivers crystal-clear audio with a wider soundstage, ensuring distortion-free, immersive sound. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eClearer Vinyl Playback with HPF: The integrated high-pass filter (only available in phono input) cuts off subsonic noise below 20Hz, reducing distortion and improving sound clarity. It ensures a cleaner playback, making your records come alive with reduced rumble and better dynamics.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eTrue Tube Amplification: Powered by brand-new PSVANE ECC83 tubes, easily swappable for tailored sound, the P7 brings warmth and sweetness to your audio. Driven at 180V, the tubes unlock the full potential of analog sound, offering a rich harmonic depth that audiophiles will appreciate.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003ePrecise Tone Control with Bypass: \u003c\/span\u003e\u003cspan\u003eFine-tune the bass and treble for a customized sound profile, or engage the bypass mode for pure, unaltered audio. Whether you’re adjusting the tone or listening to the original signal, the P7 gives you full control over your listening experience.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp data-end=\"209\" data-start=\"31\"\u003e\u003cspan\u003eQ: What is the input voltage of the P7?\u003c\/span\u003e\u003cbr data-end=\"79\" data-start=\"76\"\u003e\u003cspan\u003eA: The P7 operates at DC 12V\/≥2A. Using over voltage can cause damage, while insufficient current may affect normal operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"439\" data-start=\"216\"\u003e\u003cspan\u003eQ: Can I connect a turntable directly to the P7?\u003c\/span\u003e\u003cbr data-end=\"271\" data-start=\"268\"\u003e\u003cspan\u003eA: Before connecting, please check if your turntable has a built-in phono preamp. If so, use the RCA input to avoid unwanted noise.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"621\" data-start=\"446\"\u003e\u003cspan\u003eQ: Can the RCA and XLR outputs be used at the same time?\u003c\/span\u003e\u003cbr data-end=\"509\" data-start=\"506\"\u003e\u003cspan\u003eA: Yes, they output at the same time, with their volume and tone controlled simultaneously.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"819\" data-start=\"628\"\u003e\u003cspan\u003eQ: Is the high-pass filter active in RCA input mode?\u003c\/span\u003e\u003cbr data-end=\"684\" data-start=\"681\"\u003e\u003cspan\u003eA: No. The high-pass filter is only available in phono input mode.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"1023\" data-start=\"826\"\u003e\u003cspan\u003eQ: Can I swap op-amps in the P7?\u003c\/span\u003e\u003cbr data-end=\"865\" data-start=\"862\"\u003e\u003cspan\u003eA: Yes, the P7 features 3 pluggable NE5532 op-amps, which can be replaced with other dual op-amps such as 2604, 2134, or MUSES02 etc. High voltage inside, please make sure the op-amp is properly installed before powering on.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"1230\" data-start=\"1030\"\u003e\u003cspan\u003eQ: Can I replace the tubes in the P7?\u003c\/span\u003e\u003cbr data-end=\"1074\" data-start=\"1071\"\u003e\u003cspan\u003eA: Yes, the P7 supports swapping for PSVANE 12AX7-S, Shuguang 12AX7B, 7025, or 12AX7 tubes. Please replace tubes when powered off.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: P7\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: MM Phono \/ RCA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: RCA \/ XLR\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eInput sensitivity:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePhono input: 5mV\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRCA input: 0.775V\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eRated output level:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePhono input: RCA output: 0.5V \/ XLR output: 1V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRCA input: RCA output: 2V \/ XLR output: 4V\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eTHD+N:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRCA input: 0.1%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePhono input: 0.03%\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eSNR:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRCA input: ≥109dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePhono input: ≥82dB\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eFrequency response:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRCA input: 20Hz-20KHz (±0.8dB)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePhono input: conforms to RIAA characteristics\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTreble\/bass range: ±6dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHigh-pass filter cut-off frequency: 20Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput voltage: DC 12V≥2A (5.5*2.1mm)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 155*124*42mm \/ 6.10*4.88*1.65in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage dimensions (W*D*H): 310*240*70mm \/ 12.20*9.41*2.75in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 707g \/ 1.56lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight: 1.10kg \/ 2.43lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking list\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* P7 Preamp\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2* PSVANE ECC83 Tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* DC 12V Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47529524887784,"sku":"SUC-P7-US","price":109.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47529524920552,"sku":"SUC-P7-UK","price":109.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47529524953320,"sku":"SUC-P7-DE","price":109.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47529524986088,"sku":"SUC-P7-AU","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Other","offer_id":47529525018856,"sku":"SUC-P7","price":109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/0_8d27117d-877a-45e7-94ed-88ebb21b5c09.jpg?v=1753683974"},{"product_id":"douk-audio-4-way-audio-switcher-splitter-5-band-stereo-eq-preamp","title":"Douk Audio D5 4-Way Audio Switcher\/Splitter with EQ Preamp","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003e1-IN-4-OUT Flexible Splitter: Easily connect up to four amplifiers or active speakers etc. Choose any combination of outputs to work simultaneously, allowing for effortless comparisons or multi-device listening\u003c\/span\u003e\u003cspan\u003e, offering unmatched flexibility for your home audio setup.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003e4-IN-1-OUT Audio Switcher: \u003c\/span\u003e\u003cspan\u003eEasily switch between four different audio sources such as phones, tablets or players. Say goodbye to constant plugging and unplugging, and quickly compare multiple sources. Ideal for anyone needing seamless switching.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"359\" data-start=\"66\"\u003e\n\u003cp data-end=\"359\" data-start=\"69\"\u003e\u003cspan\u003e5-Band Equalizer with EQ Bypass: Fine-tune your sound with precise frequency adjustments at 80Hz, 330Hz, 1KHz, 3.3KHz, and 10KHz. Or switch to EQ Bypass mode for a direct, unaltered signal to your speakers or headphones, giving you full control over your sound. \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRetro-Style VU Meter: Features a large analog VU meter with 6-level backlight and gain adjustment, providing real-time visual feedback of the music's dynamics. Housed in a compact metal enclosure, it combines vintage charm with long-lasting durability.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"359\" data-start=\"66\"\u003e\u003cspan\u003eHeadphone Amplifier for Personal Listening: The D5 also doubles as a headphone amplifier, offering decent performance for personal listening. Enjoy rich, detailed audio for your headphones, enhancing every note with precision and clarity.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cstrong data-end=\"75\" data-start=\"26\"\u003eQ: Does the D5 come with a power supply?\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong data-end=\"84\" data-start=\"78\"\u003eA:\u003c\/strong\u003e\u003cspan\u003e Yes. Please use the supplied DC 5V\/2A power adapter for optimal performance. If using \u003c\/span\u003e\u003cspan\u003eother\u003c\/span\u003e\u003cspan\u003e power supply, ensure it provides at least 2A current. Otherwise, the D5 may not function properly.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp data-end=\"473\" data-start=\"282\"\u003e\u003cstrong data-end=\"354\" data-start=\"282\"\u003eQ: Can all four channels output simultaneously in \"1-IN-4-OUT\" mode?\u003c\/strong\u003e\u003cbr data-end=\"357\" data-start=\"354\"\u003e\u003cstrong data-end=\"363\" data-start=\"357\"\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYes, in \"1-IN-4-OUT\" mode, all four channels can output simultaneously, with D5 acting as an audio splitter.\u003c\/p\u003e\n\u003cp data-end=\"666\" data-start=\"480\"\u003e\u003cstrong data-end=\"511\" data-start=\"480\"\u003eQ: Can I use D5 as a 4-IN-1-OUT mixer?\u003c\/strong\u003e\u003cbr data-end=\"514\" data-start=\"511\"\u003e\u003cstrong data-end=\"520\" data-start=\"514\"\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eD5 does not support individual volume control for each channel, so it is not recommended as a mixer. However, it works effectively as a switcher.\u003c\/p\u003e\n\u003cp data-end=\"885\" data-start=\"673\"\u003e\u003cstrong data-end=\"728\" data-start=\"673\"\u003eQ: Why is there no sound when the RCA I\/O port is connected?\u003c\/strong\u003e\u003cbr data-end=\"731\" data-start=\"728\"\u003e\u003cstrong data-end=\"737\" data-start=\"731\"\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 3.5mm Priority jack takes priority over the RCA I\/O port. To use the RCA I\/O port, please ensure the Priority jack is not connected.  \u003c\/p\u003e\n\u003cp data-end=\"1104\" data-start=\"892\"\u003e\u003cstrong data-end=\"930\" data-start=\"892\"\u003eQ: There is noise during operation. What should I do?\u003c\/strong\u003e\u003cbr data-end=\"933\" data-start=\"930\"\u003e\u003cstrong data-end=\"939\" data-start=\"933\"\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIf noticeable noise occurs, please try toggling the GND switch on the rear panel. Switching it on or off can resolve most ground loop issues, but we cannot guarantee 100%.\u003c\/p\u003e\n\u003cp data-end=\"1304\" data-start=\"1111\"\u003e\u003cstrong data-end=\"1164\" data-start=\"1111\"\u003eQ: Is volume control available in EQ bypass mode?\u003c\/strong\u003e\u003cbr data-end=\"1167\" data-start=\"1164\"\u003e\u003cstrong data-end=\"1173\" data-start=\"1167\"\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYes, volume control remains available in EQ bypass mode.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Nobsound\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: D5\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: 3 groups of RCA \/ 1*3.5mm AUX\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: 3 groups of RCA \/ 1*3.5mm Jack\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWorking mode: 1-IN-4-OUT \/ 4-IN-1-OUT\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e4-Channel simultaneous output: Support\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency adjustment: 80Hz\/330Hz\/1KHz\/3.3KHz\/10KHz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEQ adjustment range: ±10dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEQ bypass mode: Support\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput impedance: 50KΩ\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput impedance: 10Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response: 20Hz-20KHz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMatched headphone impedance: 32-200Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHeadphone output power: 150mW@32Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVU meter backlight brightness adjustment: 6 levels\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVU meter swing range adjustment: Support\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWorking voltage: DC 5V\/≥2A\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H):  130*80*104mm \/ 5.12*3.15*4.09in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage dimensions (W*D*H): 210*185*100mm \/ 8.27*7.28*3.94in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 685g \/ 1.51lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight: 1.0kg \/ 2.20lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking list\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* D5 Audio Selector\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e1* DC 5V Power Adapter\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Type-C Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Screwdriver\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47544764956904,"sku":"XX-D5-US","price":109.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47544764989672,"sku":"XX-D5-UK","price":109.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47544765022440,"sku":"XX-D5-DE","price":109.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47544765055208,"sku":"XX-D5-AU","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Other","offer_id":47544765087976,"sku":"XX-D5","price":109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/000_9c3c3306-8756-46a7-b69a-f0626ce49740.jpg?v=1753953920"},{"product_id":"usb-to-spdif-converter-xmos-xu316-coaxial-optical-toslink-ddc-digital-interface","title":"Douk Audio U2 Digital Interface DDC with XMOS XU316 USB to SPDIF Converter","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eLossless USB to S\/PDIF Converter: Convert USB signals from PC, laptops, phones, tablets, and Raspberry Pi etc. to optical\/coaxial outputs simultaneously with zero loss and no latency. Ideal for DACs, digital amplifiers, or home theater systems that only support S\/PDIF input.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eXMOS XU316 Chipset for Hi-Res Audio: U2 supports up to 24bit\/192kHz PCM and DSD64 (DOP) playback. Enjoy lower jitter, cleaner signals, and rich audio detail—perfect for high-end music systems and audiophiles. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003ePlug-and-Play Simplicity: No driver needed for PCM playback on Windows 10+ and macOS. Includes a dual-head Type-A\/Type-C to Type-C cable for easy connection, fully OTG-ready for phones and instantly usable. \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eReal-Time Format Indicators:\u003c\/span\u003e\u003cspan\u003e The built-in sampling rate indicator clearly displays PCM\/DSD status and sampling rate, letting you instantly verify your audio format for accurate, bit-perfect playback and peace of mind.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCompact Design for Seamless Integration: Despite its powerful digital processing, the U2 features a lightweight and space-saving design. Ideal for HiFi desktop audio systems where space and performance both matter.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eSystem Driver Requirements\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eFor Windows 10 and Above: Driver-free for PCM; Requires driver for DSD \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eFor MacOS: Driver-free\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eFor Win 7\/8: Requires driver for PCM\/DSD\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eFor Android: Driver-free\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eFor iOS: Driver-free\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eFor Linux: Driver-free \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eWarm tips\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e1.The U2 supports OTG and comes with an OTG-compatible USB cable for direct connection to OTG-enabled phones. For iPhones or iPads with a Lightning port, a high-current camera kit is required. Newer models with a Type-C port can use the included cable directly. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e2.The U2 only supports 2.0 channel stereo audio. Multichannel formats such as 5.1, 7.1, or Dolby formats are not supported. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e3.Please install the required driver and files from the included USB drive, and follow the instructions or video guide to set up your player properly.  \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eParameters\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: U2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: USB Type-C\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: Coaxial\/Optical\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUSB chip: XMOS XU316\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax. sampling rate supported:\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003ePCM：44.1kHz-192kHz\/16Bit-24Bit\u003c\/div\u003e\n\u003cdiv\u003eDSD：DOP DSD64\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eOperation systems PC-USB supported:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003eW10\/W11\/Mac OS\/Android\/iOS\u003c\/div\u003e\n\u003cdiv\u003eWin7\/Win8\/Linux (Cannot guarantee 100% compatible)\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eTHD+N: 0.000008%\u003c\/li\u003e\n\u003cli\u003eWorking voltage: DC 5V\u003c\/li\u003e\n\u003cli\u003eDimensions (W*D*H): 40*52*20mm \/ 1.57*2.05*0.79in\u003c\/li\u003e\n\u003cli\u003ePackage dimensions (W*D*H): 170*120*50mm \/ 6.69*4.72*1.97in\u003c\/li\u003e\n\u003cli\u003eNet weight: 45g \/ 0.1lb\u003c\/li\u003e\n\u003cli\u003ePackage weight: 170g \/ 0.37lb\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking list\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* U2 Digital Interface\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Optical Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* USB-C to USB-A\/USB-C Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47632503963880,"sku":"SUC-U2-US","price":56.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47632503996648,"sku":"SUC-U2-UK","price":56.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47632504029416,"sku":"SUC-U2-DE","price":56.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47632504062184,"sku":"SUC-U2-AU","price":56.99,"currency_code":"USD","in_stock":true},{"title":"Other","offer_id":47632504094952,"sku":"SUC-U2","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_1_704745f1-09c9-46a3-9678-2a92b18817cc.jpg?v=1756342686"},{"product_id":"douk-audio-q100-ak4499-ak4191-fully-balanced-desktop-dac-dsd512","title":"Douk Audio Q100 AK4499+AK4191 Fully Balanced Desktop DAC DSD512","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFlagship DAC for Audiophiles: Featuring the premium AK4499EX + AK4191 DAC chips, aided by XU316 and QCC5125, Q100 unlocks high-resolution music in stunning detail. Supports up to PCM 768kHz\/32bit and DSD512 for an uncompromised listening experience.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eVersatile Inputs for Any Digital Source: Supports USB-C, AES, Optical, Coaxial, and Bluetooth 5.1 with LDAC, aptX-HD support. Whether you’re connecting a PC, music streamer, CD player, TV, or phone, Q100 adapts to your audio setup with unmatched clarity and compatibility.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBalanced Output for Pure HiFi Sound: Offers both balanced XLR and single-ended RCA outputs, ensuring precise stereo imaging and dynamic performance. Enjoy every detail with SNR≥124dB and THD+N at 0.0002%, built for demanding audiophiles seeking ultra-transparent sound.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eUAC Switch for Ultimate Flexibility: Enjoy broad USB compatibility. UAC1.0 ensures plug-and-play with PS5, Switch, and legacy systems; UAC2.0 unlocks high-res playback for uncompromised audio. Ideal for gaming, music, and professional use.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eUser-Centric Design with Smart Controls: Includes diverse filter modes to fine-tune sound texture and detail, 12V trigger for synchronized power on\/off, OLED screen displaying real-time status, Bluetooth reset and full remote control. A truly refined desktop DAC with thoughtful usability.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Which systems require driver installation?\u003cbr\u003eA: UAC1.0: Driver-free on all systems.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e     UAC2.0: Windows 7\/8 require drivers. Windows 10\/11 are driver-free for PCM, but need drivers for DSD. MacOS and Linux are driver-free.  \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Q100 can't work with my phone via USB, is a driver required?\u003cbr\u003eA: No, it's drive-free. Please use the supplied OTG-compatible USB cable and ensure the phone support OTG. On some phones, you may need to enable OTG in settings. For iPhones\/iPads with a Lightning port, a high-current camera kit is required.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eQ: Do the XLR and RCA outputs work simultaneously, and is the volume synchronized?\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: Yes, both outputs work at the same time, with volume control applied to both simultaneously.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: What op-amps are used, and can they be replaced?\u003cbr data-end=\"86\" data-start=\"83\"\u003eA: The Q100 uses five OPA1612 surface-mount op-amps, which are soldered directly onto the board and cannot be replaced or swapped out. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Which functions can only be controlled via the remote control?\u003cbr data-end=\"1206\" data-start=\"1203\"\u003eA: Only clearing Bluetooth pairing and UAC1.0\/2.0 switching must require the remote; all other functions can be operated from the panel.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eQ: Does switching UAC mode require restarting the Q100?\u003c\/div\u003e\n\u003cdiv\u003eA:\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eUsually no restart is required. For a small number of computers the USB cable may need to be reconnected.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Does the remote control come with batteries?\u003cbr\u003eA: For safer and faster delivery, the remote control may not include batteries (AAA*2). Please prepare batteries yourself.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: Q100\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: Bluetooth 5.1\/USB-C\/Coaxial\/Optical\/AES\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: XLR\/RCA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eChipset: AK4499+AK4191+QCC5125+XU316+OPA1612\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBluetooth supported codecs: SBC\/AAC\/aptX\/aptX-HD\/LDAC\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eMax sampling rate supported:\u003cbr\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eUSB input: PCM 768kHz\/32bit, DSD512 (native), DSD256 (DoP)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCoaxial\/Optical input: PCM 192kHz\/24bit, DSD64 (DoP)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAES input: 192kHz\/24bit\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response: 20Hz-20KHz (±0.1dB)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: ≥124dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTHD+N: 0.0002%@1kHz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eMax output level: RCA:2.3V; XLR:4.5V\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUSB compatible operating systems: Windows 7\/8\/10\/11, macOS, Linux, Android, iOS \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eFilter modes: \u003c\/span\u003e\u003cspan\u003ePCM:6 modes, \u003c\/span\u003e\u003cspan\u003eDSD:2 modes\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBrightness of display screen: 10-100%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eScreen display time: 15s\/30s\/solid on\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWorking voltage: Adaptive AC 100-130V \/ 200-240V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 228*170*46mm \/ 8.98*6.69*1.81in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage dimensions (W*D*H): 400*230*80mm \/ 15.74*9.05*3.15in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 1.73kg \/ 3.81lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight: 3.0kg \/ 6.611b\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* Q100 DAC\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Bluetooth Antenna\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Remote Control\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Power Cord\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* USB-A\/C to USB-C Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Optical Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47679411486952,"sku":"SUC-Q100-US","price":499.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47679411519720,"sku":"SUC-Q100-UK","price":549.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47679411552488,"sku":"SUC-Q100-DE","price":499.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47679411585256,"sku":"SUC-Q100-AU","price":549.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":47679411618024,"sku":"SUC-Q100","price":549.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_ad01d96f-c045-4acf-bd3f-2b8fc2dd8241.jpg?v=1757923630"},{"product_id":"ampapa-d1-hifi-bluetooth-amplifier-with-digital-vu-meters-hpf","title":"Ampapa D1 HIFI TPA3255 Amplifier with Digital VU Meter","description":"\u003cdiv\u003e\n\u003cspan\u003eFeatures\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eAmpapa × Douk Audio Collaboration: Built on the acclaimed Douk Audio A5 amp, the D1 retains core features like TPA3255 chip, HPF, PRE-OUT, socketed op-amps—now upgraded with digital VU display, TRS balanced input, Bluetooth 5.2, treble\/bass control, remote and more for next-gen HiFi performance.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDigital VU Meters with Retro Soul: D1 features a vibrant OLED screen that merges classic aesthetics with modern utility. Enjoy 7 VU styles in classic yellow, blue, or black and view real-time feedback of all operations and playback. Both stylish and functional, it brings your music to life.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eEngineered for True 2.1 Systems: The adjustable 30–200Hz high-pass filter removes low frequencies from the main output, letting your stereo speakers focus on mids and highs with better clarity, while PRE-OUT offers full-range signal to active subwoofers, amplifiers, or active speakers.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePremium Components for Superior Fidelity: Pluggable NE5532 op-amps allow for effortless upgrades through the top glass panel for long-term flexibility. From NJW1194 chip, SAGAMI inductors, 2oz copper PCB to GaN 48V\/5A power adapter, every element is chosen for sonic purity. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eEngineered for Everyday Convenience: With a 12V trigger, infrared remote, one-touch mute and Bluetooth reset, D1 simplifies your daily audio setup. Fine-tune your sound with ±10dB tone control, while internal RGB lighting adds a refined, modern glow. Enjoy seamless operation from start to finish.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Can I replace the op-amps in the D1？\u003cbr\u003eA:Yes, the D1 uses 2PCs pluggable NE5532 op-amps,which can be replaced by normal dual op-amps like 2604\/2134\/muses02 etc. Before replacing, please turn off the power, ensure correct orientation, and power ononly after confirming proper installation.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Why don't the single VU meter and spectrum display work properly?\u003cbr\u003eA: In dual VU meter mode, both meters show the audio levels for the left and right channels separately.In single VU meter and spectrum modes, the D1 only detects the left channel input. If only the right channel is connected, the VU meter and spectrum display will not operate.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Does the high-pass filter affect the Pre-Out signal?\u003cbr\u003eA:No,the high-passfilteronly applies to the speaker output. The Pre-Out delivers a full-range signal.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Are the Pre-Out's volume and tone controls synchronized with the speaker output?\u003cbr\u003eA: Yes.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Is it normal for the D1 to become hot during operation?\u003cbr\u003eA: The D1's TPA3255 amp chip dissipates heat through contact with the chassis. It is normal for the chassis to heat up during operation. This does not affect performance or lifespan of the D1. Please place the D1 in a well-ventilated area,and avoid stacking devices or blocking ventilation.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eQ: What should I use the 12V trigger input for?\u003cbr\u003eA: The 12V trigger input is designed for use with preamps or DACs that have a trigger output to achieve synchronous power on and off. Please do not use this port as an audio input or connect it to a power supply, as this could damage the D1.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: What is the required power supply for the D1?\u003cbr\u003eA:The D1 requires a DC 24-48V (≥4A) input voltage. Please use the supplied power adapter for optimal performance. lf using a third-party power supply,ensure it meets the required voltage and current specifications.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Why doesn't the remote control include batteries?\u003cbr\u003eA:For safer and faster delivery, the remote control may not include batteries (AAA*2). Please prepare them yourself.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Ampapa\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: D1\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: RCA\/TRS\/Bluetooth 5.2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: Banana speaker jacks \/ Pre-Out\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax. output power: 300W*2 (4Ω）\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTHD+N: 0.002%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: ≥114dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response: 20Hz-20KHz (±0.4dB)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHigh-pass filter frequency range: 30Hz-200Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHigh-pass fiter roll-off: 12dB per octave\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBluetooth chip: QCC304X\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBluetooth supported codecs: SBC\/AAC\/aptX\/aptX-HD\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput sensitivity: RCA: 2V  TRS: 4V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePre-out rated output level: 3.5V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMatched speaker impedance: 4-8Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTreble\/bass range: ±10dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput voltage: DC 24-48V\/ ≥4A (5.5*2.5mm)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 155*124*42mm \/ 6.10*4.88*1.65in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage dimensions (W*D*H): 268*192*95mm \/ 10.55*7.56*3.74in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 742g \/ 1.64lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003ePackage weight: 1.73kg \/ 3.81lb\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePower Output Table of the D1\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003ctable border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003ePower Supply\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSpeaker Impedance\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOutput Power\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"3\"\u003e\u003cspan\u003e48V\/5A\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4Ω\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e120W+120W\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e6Ω\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e110W+110W\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e8Ω\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e102W+102W\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* D1 Amp\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* DC 48V5A GaN Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Remote Control\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Bluetooth Antenna\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Cleaning Cloth\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Certificate\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e1* Warranty\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47672444551400,"sku":"SUC-D1-US","price":199.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47672444584168,"sku":"SUC-D1-UK","price":199.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47672444616936,"sku":"SUC-D1-DE","price":199.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47672444649704,"sku":"SUC-D1-AU","price":199.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":47672444682472,"sku":"SUC-D1","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_89339c36-f90f-499f-90b7-0be0d92e6ffc.jpg?v=1757470299"},{"product_id":"ampapa-q1","title":"Ampapa Q1 HIFI ESS9039+AK4493 Desktop DAC [Based on DAC-Q11]","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eNext-Gen DAC Performance: A fully upgraded successor to the Douk Audio DAC-Q11, the Q1 retains its signature dual-DAC design while improving every core spec with cutting-edge ESS9039, AK4493, XMOS XU316, Bluetooth 5.2 and vivid OLED display. High-res support up to PCM 768kHz\/32bit and DSD512 delivers studio-level clarity.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDual DAC Architecture: Easily switch between ESS9039 for clean, analytical sound or AK4493 for smoother musicality. Assign your preferred DAC chip and filter mode to each LINE and headphone output, tailoring sound to different genres, gear, or moods. SINAD ≥113dB, THD+N as low as 0.0002%, ensuring clean, distortion-free audio.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eExpressive Display with Style: The screen clearly shows input mode, DAC chip assignment, USB driver mode, and volume—everything you need at a glance. Q1 also offers 11 unique display modes, including diverse retro-style VU meters, audio spectrum, spinning vinyl, and cassette-style reels, each adding visual character to your HiFi setup.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eInput and Output Versatility: Supports USB-C with UAC 1.0\/2.0 modes for wider compatibility, including gaming consoles, plus Bluetooth with aptX\/aptX-HD, coaxial, and optical inputs. Q1 has 2xRCA and 2xbalanced TRS outputs, powering up to four amps or active speakers at once. A 3.5mm headphone jack offers personal listening with 1000mW output and two gain levels for optimal performance with both IEMs and high-impedance headphones.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFull Control at Your Fingertips: Customize your audio with four swappable  LME49720 op-amps, easily accessible via a top window. Q1 also features full-spectrum RGB lighting, remote control, Bluetooth reset, adjustable brightness, and 12V trigger out. Perfectly matched with the Ampapa D1 for a cohesive stack both visually and functionally.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eQ: What operating systems are compatible with the Q1’s USB connection, and do I need to install a driver?\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e Q1 \u003c\/span\u003e\u003cspan\u003esupports\u003c\/span\u003e\u003cspan\u003e Windows 10\/11, macOS, Android, iOS, and audio-focused Linux (e.g. Volumio, ROON). USB connection with phones requires OTG support. No drivers \u003c\/span\u003e\u003cspan\u003eneeded\u003c\/span\u003e\u003cspan\u003e for mobile devices, macOs, or Linux. Windows needs a driver only in UAC 2.0 mode.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cstrong data-end=\"639\" data-start=\"581\"\u003eQ: Can I remove the mesh layer on the Q1’s top window?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr data-end=\"642\" data-start=\"639\"\u003e\u003cspan\u003e\u003cstrong data-end=\"650\" data-start=\"644\"\u003eA:\u003c\/strong\u003e No. It’s a built-in EMI shield to prevent signal interference. Please do not remove it, and keep phones or routers away from the Q1.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cstrong data-end=\"590\" data-start=\"543\"\u003eQ: Can I replace the op-amps in the Q1?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr data-end=\"593\" data-start=\"590\"\u003e\u003cspan\u003e\u003cstrong data-end=\"599\" data-start=\"593\"\u003eA:\u003c\/strong\u003e Yes, the Q1 uses 4PCs pluggable  LME49720 op-amps, which can be replaced by standard dual op-amps like 2604\/2134\/muses02 etc. \u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cstrong data-end=\"814\" data-start=\"748\"\u003eQ: Why don't the single VU meter and spectrum display work properly?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr data-end=\"817\" data-start=\"814\"\u003e\u003cspan\u003e\u003cstrong data-end=\"823\" data-start=\"817\"\u003eA:\u003c\/strong\u003e In single VU meter and spectrum modes, the Q1 only detects the left channel input. If only the right channel is connected, the VU meter and spectrum display will not operate. \u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cstrong\u003eQ: Why can't I find Q1 in my Bluetooth list?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr data-end=\"507\" data-start=\"504\"\u003e\u003cspan\u003e\u003cstrong\u003eA: \u003c\/strong\u003eMake sure Q1 is set to Bluetooth mode, then turn on Bluetooth on your phone and search for \"AMPAPA Q1\" to connect. If Q1 still doesn't appear, try clearing previous connections using the remote control.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cstrong data-end=\"596\" data-start=\"523\"\u003eQ: Why do the vinyl and tape-style displays spin at a constant speed?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr data-end=\"599\" data-start=\"596\"\u003e\u003cspan\u003e\u003cstrong data-end=\"605\" data-start=\"599\"\u003eA:\u003c\/strong\u003e These two display modes don’t react to audio signals, so they simply maintain a constant rotation speed. Even if the music is paused,the rotation continues as long as the mode is engaged. \u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cstrong\u003eQ: Why does the VU meter show a large deflection at low volume, but a smaller deflection at high volume? \u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e The Q1 features an automatic gain control system (AGC) for the VU meters. \u003c\/span\u003e\u003cspan\u003eWhen the input signal is low, the system switches to high gain; when the \u003c\/span\u003e\u003cspan\u003esignal is high, it switches to low gain. This ensures the VU meters maintain \u003c\/span\u003e\u003cspan\u003esufficient deflection across different volume levels.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cstrong\u003eQ: Does the remote control include batteries?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA: \u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003eFor safer and faster delivery, the remote control may not include batteries (AAA*2). Please prepare them yourself.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Ampapa\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: Q1\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: Bluetooth 5.2 \/ USB-C \/ Coaxial \/ Optical\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: 2 sets of RCA \/ 2 sets of balanced TRS \/ 3.5mm headphone jack\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eChipset: ESS9039Q2M+AK4493+XMOS XU316+QCC304X+ LME49720\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eMax. sampling rate supported:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePC-USB: PCM 768KHz\/32bit, DSD(Native) 512, DSD(DoP) 256\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCoaxial \/ Optical: PCM 192KHz\/24bit, DSD(DoP) 64\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBluetooth 5.2: 48KHz\/24Bit\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUSB supported operating systems: W10\/W11\/macOs\/Linux\/Android\/iOS\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBluetooth supported codecs: SBC\/aptX\/aptX-HD\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response: 20Hz-20kHz (±0.2dB)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTHD+N: 0.0002%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: ≥120dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax. output level: RCA: 2V   TRS: 4V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eMax. headphone output power\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHigh gain: 1000mW@32Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLow gain: 380mW@32Ω \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMatched headphone impedance: 16-600Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput sensitivity: 0dBFS\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUSB driver mode: UAC 1.0\/2.0\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRemote control: Supported\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eScreen display: 11 VU modes +1 working status mode\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBacklight brightness: 10-level adjustment\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLED color: Infinite RGB color combinations\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWorking voltage: DC 12V (5.5*2.1mm)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 155*124*42mm \/ 6.10*4.88*1.65in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Dimensions (W*D*H): 300*230*70mm \/ 11.81*9.05*2.75in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 643g \/ 1.42lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight: 1.2kg \/ 2.64lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* Q1\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* DC 12V Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Bluetooth Antenna\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* USB-C to USB-A\/USB-C Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Optical Fiber Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* 3.5mm Trigger Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Remote Control (without battery)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Cleaning Cloth\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Certificate\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Warranty\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cread-frog-selection class=\"notranslate\" style=\"overflow: visible; position: relative; width: 0px; height: 0px; display: block;\"\u003e\u003c\/read-frog-selection\u003e\u003c\/p\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47772093776104,"sku":"SUC-Q1-US","price":269.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47772093808872,"sku":"SUC-Q1-UK","price":269.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47772093841640,"sku":"SUC-Q1-DE","price":269.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47772093874408,"sku":"SUC-Q1-AU","price":269.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":47772093907176,"sku":"SUC-Q1","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/00_c6fd70eb-f526-4dea-8fcf-ae28df9f4a60.jpg?v=1764921914"},{"product_id":"nobsound-ns-02g-pro","title":"Nobsound NS-02G PRO HiFi Single-Ended Class A Stereo Amplifier","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eWarm and Natural Sound: Built on a single-ended Class A topology, the NS-02G PRO delivers low-distortion output with natural warmth and realism in vocals and instruments. Its smooth, immersive soundstage is perfect for long listening sessions in cozy setups or dedicated HiFi spaces.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFully Symmetrical Circuit: The fully symmetrical amplifier circuit reduces phase distortion and maintains signal integrity throughout the frequency range. This ensures cleaner output, improved imaging, and greater musical nuance, especially in acoustic and vocal-rich recordings.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePowerful Enough for Most Speakers: With RMS output up to 30Wx2 (8Ω) \/ 42Wx2 (4Ω) in Class A operation, it can effortlessly drive most bookshelf and floor-standing speakers. Enjoy full-bodied sound with punchy bass and detailed mids, whether you're spinning vinyl, streaming, or playing CDs. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eAudiophile Components: With Toshiba 2SA1943\/5200 transistors, 150W copper toroidal transformer, ALPS potentiometer, and 40,000μF capacitors, it ensures stable current, deeper bass, and wider soundstage. Gold-plated RCA jacks preserve purity and pluggable op-amps allow higher playability.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFlexible Inputs and Safety Protection: Dual RCA inputs with an input switch support quick source switching and comparing without plugging and unplugging cables. Built-in protection systems like DC protection, surge-protected delay, and overheat protection, keep both your amp and speakers safe.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eQ: How can I replace the op-amps?\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The swappable NE5532 op-amps are located beneath a relay module. You’ll need to remove a few screws to access and replace them. Please proceed carefully or contact us if unsure.  \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Nobsound\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: NS-02G PRO\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: 2 groups of RCA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: Banana speaker jacks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput power (RMS): 30W*2@8Ω; 42W*2@4Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response: 30Hz-20kHz  \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTHD: ≤1%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: ≥86dB (A-weighted)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRating input level: 500mV\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRating load impedance: 4Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePower consumption: ≤120W\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput voltage: AC 100-120V \/ 220-240V, 50\/60Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 457*310*140mm \/ 12.99*8.27*2.76in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 5.6kg \/ 12.35lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight: 6.5kg \/ 14.33lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking list\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* NS-02G PRO\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Power Cord\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Instruction Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48089374851304,"sku":"DZ113-US","price":359.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48089374884072,"sku":"DZ113-UK","price":359.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48089374916840,"sku":"DZ113-DE","price":359.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48089374949608,"sku":"DZ113-AU","price":359.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48089374982376,"sku":"DZ113","price":359.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/DZ113_1_ef763011-4b4b-494d-a157-129b607d3ecf.jpg?v=1772163888"},{"product_id":"douk-audio-d2-15w-hifi-linear-power-supply-with-dc-usb-5v-output","title":"Douk Audio D2 15W HiFi Linear Power Supply with DC+USB 5V Output","description":"\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"8\"\u003e\u003cspan\u003e\u003cstrong data-end=\"307\" data-start=\"279\"\u003eCleaner 5V Linear Power:\u003c\/strong\u003e Replaces ordinary switching power adapters with clean, stable 5V DC power. The D2 helps reduce power-related noise and interference, giving your HiFi system a darker background, smoother highs, and more natural detail.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"9\"\u003e\u003cspan\u003e\u003cstrong\u003eUltra-Low Ripple Output\u003c\/strong\u003e: With ripple noise below 20μV under no-load conditions, 15W output power, and up to 2.5A current, the D2 provides a low-noise power foundation for sensitive audio circuits that require stable 5V supply.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong data-end=\"581\" data-start=\"553\"\u003eDual Output Convenience\u003c\/strong\u003e: Equipped with 1×USB-A and 1×DC output, the D2 can power two compatible 5V devices at the same time. Ideal for DACs, DDCs, Raspberry Pi, USB audio devices, and headphone amps etc.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"10\"\u003e\u003cspan\u003e\u003cstrong\u003eStable Power Architecture\u003c\/strong\u003e: Built with a custom sealed transformer, LM1085IT voltage regulator, Panasonic FM capacitors, and PTC resettable fuse. The design helps deliver steady 5V output, low-ripple DC power, and added circuit protection.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"12\"\u003e\u003cspan\u003e\u003cstrong\u003eCompact Aluminum Chassis\u003c\/strong\u003e: The CNC-machined aluminum chassis offers solid durability, better heat dissipation, and helps reduce external interference. Compact and stack-friendly, the D2 fits neatly into desktop HiFi, PC audio, and small home audio systems.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: The D2 has two output terminals. Can both terminals be used simultaneously at full rated current?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: No. You can connect two output devices at the same time, but the total current drawn from both outputs must not exceed the rated output current.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: The DC output jack is 5.5mm\/2.5mm, and my device's power jack is 5.5mm\/2.1mm. Are they compatible?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: Yes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: Is the output voltage of the D2 adjustable?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: The output voltage is typically fixed and can only be fine-tuned within about ±0.5V. Normally no adjustment is required.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: If I connect two devices to the D2 at the same time, will ground noise occur?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: It depends on the connected devices. If ground noise occurs when powering two devices, we recommend using the D2 to power only one device. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: My device requires a 5V \/ 1A power supply. Can I safely use the D2 5V \/ 2.5A output?  \u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: Yes. 2.5A is the maximum available current. Your device will only draw the current it needs, so it can be used safely.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: Why do the D2 generate more heat than switching power supplies? Is it safe?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: It is normal. Linear power supplies operate at lower efficiency, so more energy is converted into heat. The D2 is safe when used within rated load limits.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: D2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput Interface: DC \/ USB Port\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput Voltage: DC 5V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput Power: 15W\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRated Output Current: 2.5A\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRipple Noise: No load \u0026lt;20μV\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDC Output Connector: 5.5 × 2.5 mm, positive inside and negative outside, compatible with 5.5 × 2.1 mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput Voltage: AC 110V–120V \/ AC 220V–240V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W × D × H): 125 × 80 × 40 mm \/ 4.92 × 3.15 × 1.57 in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet Weight: 600 g \/ 1.32 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Weight: 900 g \/ 1.98 lb \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* D2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* DC Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Power Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48560181608680,"sku":"LHY-D2-US","price":89.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48560181641448,"sku":"LHY-D2-UK","price":89.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48560181674216,"sku":"LHY-D2-DE","price":89.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48560181706984,"sku":"LHY-D2-AU","price":89.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48560181739752,"sku":"LHY-D2","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/9_d5a62d27-aaa6-4c48-82c1-dcad714890e8.jpg?v=1778824457"},{"product_id":"douk-audio-t12-hifi-tube-phono-preamp-for-mm-mc-turntables-headphone-amp-with-vu-meter","title":"Douk Audio T12 Tube Phono Preamp MM\/MC Turntable Headphone Amp","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-end=\"435\" data-start=\"194\"\u003e\u003cspan\u003eDisplay-Worthy Vintage Design: Real walnut housing, glowing tubes, and retro sliders give T12 the warm, nostalgic look of classic audio gear, turning a practical tube preamp into a refined HiFi piece that feels at home beside turntables, speakers, and records.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"662\" data-start=\"437\"\u003e\u003cspan\u003ePhono and Line-In Flexibility: Works with MM and MC turntable setups for vinyl playback, while the RCA line input connects CD players, DACs, streamers, or other analog sources, letting T12 serve as both a phono stage and tube preamp for everyday HiFi listening.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"881\" data-start=\"664\"\u003e\u003cspan\u003eBring Out the Tube Warmth: A 120V tube stage helps the 6J5B-Q tubes open up with a smoother, fuller analog tone. Along with low THD and high SNR, T12 gives vocals more body, music a warmer flow, and playback a cleaner foundation.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eTune Sound by Sight and Touch: Bass and treble adjust up to ±10dB, with center-detent sliders for an easy return to neutral. The visible slider positions are easy to read at a glance, helping you fine-tune sound for different records, speakers, rooms, or personal taste.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"1112\" data-start=\"883\"\u003e\u003cspan\u003eOutput Switching Made Easy: Dual RCA outputs let you switch between two amplifier or powered speaker systems for quick comparison or daily listening, without the hassle of repeated unplugging. The 3.5mm headphone output makes late-night personal listening easier.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48585375449320,"sku":"XX-T12-US","price":109.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48585375482088,"sku":"XX-T12-UK","price":109.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48585375514856,"sku":"XX-T12-DE","price":109.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48585375547624,"sku":"XX-T12-AU","price":109.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48585375580392,"sku":"XX-T12","price":109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/0_efd1e6c3-2780-4d30-b746-bc5b2f2f53b0.jpg?v=1779698141"},{"product_id":"douk-audio-d2-pro-dc-12v-linear-power-supply-low-noise-35w","title":"Douk Audio D2-PRO 35W Linear Power Supply with Dual DC 12V OUT","description":"\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-end=\"3038\" data-start=\"2738\" data-section-id=\"1lkp4wv\"\u003e\u003cspan\u003eCleaner Linear Power Upgrade: Ordinary switching adapters can introduce ripple, electrical noise, and interference into sensitive audio gear. As a linear power supply, the D2-PRO helps create a darker background, smoother highs, and cleaner detail for a more refined listening experience.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"3324\" data-start=\"3040\" data-section-id=\"155koxo\"\u003e\u003cspan\u003e28μV Ultra-Low Ripple: Ripple noise is measured at only 28μV RMS under no-load conditions, giving sensitive audio circuits a cleaner power foundation. By reducing power-related noise at the source, it supports steadier imaging, cleaner dynamics, and more natural detail. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"3576\" data-start=\"3326\" data-section-id=\"1m1di7a\"\u003e\u003cspan\u003eLow-Noise Power Architecture: A sealed toroidal transformer, EMI suppression circuit, high-speed rectifier, large-capacity matrix filtering, and LDO regulator work together to isolate grid interference, smooth DC output, and deliver stable, well-regulated DC power.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"3843\" data-start=\"3578\" data-section-id=\"ypninp\"\u003e\u003cspan\u003e35W Dual DC Output: With up to 35W output power and 2.5A current capacity, the D2-PRO can run one or two compatible devices from the same clean regulated source. Dual DC outputs help create a more consistent low-noise power setup for compact HiFi systems.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"1526\" data-start=\"1260\" data-section-id=\"xwcji6\"\u003e\u003cspan\u003eMade for HiFi Audio Systems: Designed for 12V DACs, preamps, headphone amps, streamers, digital interfaces, audio switches, and network switches. The aluminum chassis helps improve heat dissipation and reduce external interference for stable daily use.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48612941037800,"sku":"LHY-D2-PRO-US","price":129.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48612941070568,"sku":"LHY-D2-PRO-UK","price":149.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48612941103336,"sku":"LHY-D2-PRO-DE","price":149.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48612941136104,"sku":"LHY-D2-PRO-AU","price":149.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48612941168872,"sku":"LHY-D2-PRO","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_8e979cae-0b14-4f1c-8fca-bdb96c9de4d5.jpg?v=1780452409"},{"product_id":"douk-audio-vfd253-4-channel-audio-selector-music-spectrum-display","title":"Douk Audio VFD253-PRO 4 Channel Audio Selector Music Spectrum Display","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFlexible 4-Channel RCA Routing: Works as a 1-in-4-out distributor or 4-in-1-out selector to manage your HiFi system with less cable swapping. Send one source to one, several, or all selected outputs, or switch between multiple sources with ease. Lighted buttons show the active channel at a glance.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e25-Band VFD Spectrum Visualizer: The 25×15 VFD display turns music into real-time spectrum motion with clearer frequency layers and richer visual detail. Use line-in RCA for direct signal tracking, or built-in MIC pickup to capture nearby sound for easier visual display across more setups.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCustomizable Spectrum Display: Multiple modes, range selection, gain, brightness, and response tuning help the spectrum stay clear, full, and engaging across different sources and listening styles. Whether the signal is weak, the room is bright, or you prefer truer response over smoother motion, you can tune the display to look right.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDirect Isolated Signal Path: RCA input and output are directly connected without op-amp processing, keeping the audio path simple and clean. Transformer isolation separates the VFD drive circuit from the audio route, helping reduce display-related interference while preserving your original signal.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBuilt for Daily HiFi Use: The remote control gives quick access to channel selection, brightness, spectrum response, and clock settings etc. Accurate clock display adds practical desktop use, while aluminum housing and tempered glass bring a solid, refined finish to your HiFi setup. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv data-is-intersecting=\"true\" data-turn-id-container=\"df0ed69b-ad47-4d85-b708-7062d419f470\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv data-is-intersecting=\"true\" data-turn-id-container=\"request-6a18043f-95f8-83a9-8a9b-c12c437eb771-73\"\u003e\n\u003csection dir=\"auto\" data-turn=\"assistant\" data-scroll-anchor=\"false\" data-testid=\"conversation-turn-148\" data-turn-id-container=\"request-6a18043f-95f8-83a9-8a9b-c12c437eb771-73\" data-turn-id=\"request-6a18043f-95f8-83a9-8a9b-c12c437eb771-73\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\"\u003e\n\u003cdiv dir=\"auto\" data-turn-start-message=\"true\" data-message-model-slug=\"gpt-5-5-thinking\" data-message-id=\"c4d41c16-f844-49ae-b9be-15fe842270c9\" data-message-author-role=\"assistant\" tabindex=\"0\"\u003e\n\u003cp data-end=\"216\" data-start=\"0\"\u003e\u003cstrong\u003eQ: Can the VFD253 Pro be used as a mixer?\u003c\/strong\u003e\u003cbr data-end=\"44\" data-start=\"41\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eNo. It does not provide independent volume control for each channel. It is more suitable as an audio switcher or splitter rather than a mixer.  \u003c\/p\u003e\n\u003cp data-end=\"495\" data-start=\"218\"\u003e\u003cstrong\u003eQ: What signal does the spectrum display show?\u003c\/strong\u003e\u003cbr data-end=\"267\" data-start=\"264\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe spectrum comes from the rear I\/O port. In 1-in-4-out mode, it shows the source signal. In 4-in-1-out mode, it follows the selected input. If multiple inputs are selected, it may show combined signal, but this is not recommended.  \u003c\/p\u003e\n\u003cp data-end=\"723\" data-start=\"497\"\u003e\u003cstrong\u003eQ: What is the difference between Real Display and Smooth Display?\u003c\/strong\u003e\u003cbr data-end=\"566\" data-start=\"563\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eReal Display follows signal changes more directly for a more accurate visual response. Smooth Display offers smoother, steadier movement for better viewing.\u003c\/p\u003e\n\u003cp data-end=\"991\" data-start=\"725\"\u003e\u003cstrong\u003eQ: Why does the display switch to clock mode when there is no audio signal?\u003c\/strong\u003e\u003cbr data-end=\"803\" data-start=\"800\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis is normal. If no audio signal is detected for about 5 seconds, the display can switch to clock mode. This function can be turned on or off by remote control.  \u003c\/p\u003e\n\u003cp data-end=\"1316\" data-start=\"993\"\u003e\u003cstrong\u003eQ: How should I power the VFD253 Pro?\u003c\/strong\u003e\u003cbr data-end=\"1045\" data-start=\"1042\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePlease use the included 5V USB power adapter. Do not power it from the same device used as the audio source, as shared grounding may cause background noise or hum.  \u003c\/p\u003e\n\u003cp data-end=\"1316\" data-start=\"993\"\u003e\u003cspan\u003e\u003cstrong\u003eQ: Does the remote control include batteries?\u003c\/strong\u003e\u003cbr data-end=\"95\" data-start=\"92\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No. Batteries are not included for safer and faster delivery. Please prepare compatible batteries separately before use.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: VFD253 Pro\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio Input: RCA \/ MIC Pickup\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio Output: RCA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOperating Modes: 1-in-4-out \/ 4-in-1-out\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisplay Type: VFD\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisplay Resolution: 25 × 15\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisplay Content: Music Spectrum \/ Clock\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisplay Modes: 7 main display modes with sub-modes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSpectrum Range: LOW \/ MID \/ FULL\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisplay Response: Real Display \/ Smooth Display\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdjustments: Brightness \/ Gain \/ Sensitivity \/ Peak Hold\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eClock IC: RX8025T\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTime Accuracy: Within 1 minute per year\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRemote Control: Supported\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePower-Off Memory: Supported\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePower Input: DC 5V \/ ≥1A\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions: 172 × 107 × 70 mm \/ 6.77 × 4.21 × 2.76 in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Dimensions (W*D*H): 200 × 185 × 98 mm \/ 7.87 ×\u003cem\u003e \u003c\/em\u003e7.28 × 3.85 in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet Weight: 650 g \/ 1.43 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Weight: 980 g \/ 2.16 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* VFD253 PRO\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* USB-C Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Screwdriver\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Remote Control (Without Batteries)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48640104005864,"sku":"XX-VFD253-PRO-US","price":139.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48640104038632,"sku":"XX-VFD253-PRO-UK","price":139.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48640104071400,"sku":"XX-VFD253-PRO-DE","price":139.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48640104104168,"sku":"XX-VFD253-PRO-AU","price":139.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48640104136936,"sku":"XX-VFD253-PRO","price":139.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_1420dda3-9187-4cd3-a92b-1b75045b7455.jpg?v=1781259983"}],"url":"https:\/\/duukaudio.com\/it\/collections\/15-%e6%8a%98%e6%89%a3.oembed?page=2","provider":"Douk Audio","version":"1.0","type":"link"}