{"product_id":"nobsound-hifi-stereo-bluetooth-5-0-digital-power-amplifier-usb-music-player-2-4-channel-home-multi-zone-audio-amp-receiver-50w-4","title":"Nobsound HiFi Stereo Bluetooth 5.0 Digital Power Amplifier USB Music Player 2\/4 Channel Home Multi Zone Audio Amp Receiver 50W*4","description":"\u003ch1\u003eSPECIFICATIONS\u003c\/h1\u003e\u003cp\u003e\u003cspan\u003eBrand Name\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eDouk Audio\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eCertification\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eCE\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eChannels\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e4\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eDOUK AUDIO Model\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eM4\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eMaximum Power Per Channel\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e50 W\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eModel Number\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eM4\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOrigin\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMainland China\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003ePackage\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eYes\u003c\/span\u003e\u003c\/p\u003e\u003cdiv class=\"detailmodule_html\"\u003e\u003cdiv class=\"detail-desc-decorate-richtext\"\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003ckse:widget data-widget-type=\"customText\" id=\"16942927\" type=\"custom\"\u003e\u003c\/kse:widget\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"Microsoft YaHei\";font-size:medium;color:rgb(0, 0, 0)'\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eFeatures\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"Microsoft YaHei\";font-size:medium;color:rgb(0, 0, 0)'\u003e\u003cdiv id=\"pastingspan1\" style='font-family:\"Times New Roman\";font-size:14pt'\u003e\u003cul\u003e\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eOne group of stereo RCA (CH3 and CH4) can be used as audio input or output by switching the selector, to acheive different demands:\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cblockquote style='font-family:\"Microsoft YaHei\";font-size:medium;color:rgb(0, 0, 0);border:none;margin:0px 0px 0px 40px;margin-bottom:0px;margin-top:0px;margin-left:40px;margin-right:0px;padding:0px 0px 0px 0em;padding-bottom:0px;padding-top:0px;padding-right:0px'\u003e\n\u003cdiv id=\"pastingspan1\" style='font-family:\"Times New Roman\";font-size:14pt'\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eCH3\/CH4 as audio output: 4 groups of speaker sockets can connect to 2 pair of speakers. Besides connect to active speakers, CH3\/CH4 also can connect to another M4 amplifier to connect more speakers, in this way multiple amplifiers and multiple speakers can be connected in turn, to achieve one audio signal be shared in several rooms.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eCH3\/CH4 as audio input: one input corresponds to one output (ex. CH1 speaker socket will output the audio signal that CH1 inputs), which means that two groups of stereo audio signal (or 4 groups of mono audio signal) can be input at the same time.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/blockquote\u003e\n\u003cdiv style='font-family:\"Microsoft YaHei\";font-size:medium;color:rgb(0, 0, 0)'\u003e\u003cdiv id=\"pastingspan1\" style='font-family:\"Times New Roman\";font-size:14pt'\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eSupporting wired 2 groups of stereo RCA and wireless Bluetooth 5.0 input, compatible with most common audio device such as phones, computers, TVs, MP3, TV, CD players etc. With U-disk input, it can be used as a digital music player, supporting MP3, WAV, APE, FLAC and WMA lossless formats.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eWith 4 groups of speaker sockets output, they can output at the same time and each channel with independent volume control. Its max output power can reach 50W×4, and equipped with high-quality 24V\/4.5A power supply, enough to drive most home speakers.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eReasonable circuit layout, concise wiring and high-quality components to ensure HiFi clear sound and long time stable work. Separate design of small and large signal circuit for better circuit protection. Unique Bluetooth design without any external antenna, very practical and beautiful.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003ePropersize with exquisite appearance, aluminum alloy case is CNC machined and with anodizing process, more fashionable and durable, very suitable for home, office and desktop audio system use.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"Microsoft YaHei\";font-size:medium;color:rgb(0, 0, 0)'\u003e\u003cspan style=\"color:rgb(0, 0, 255);font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003e\u003cspan style=\"font-size:24px\"\u003eNotice: U-disk input is prior to Bluetooth input, so please make sure U-disk has been pulled out if you want Bluetooth input.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family:\"Microsoft YaHei\";font-size:medium;color:rgb(0, 0, 0)'\u003e\n\u003chr\u003e\n\u003cdiv style=\"font-family:Poppins;font-size:13px\"\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eParameters\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv id=\"pastingspan1\" style='font-family:\"Times New Roman\";font-size:14pt'\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eModel: Douk Audio M4\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eChannel: 2.0 \/ 4.0\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eAudio input: Bluetooth\/Stereo RCA\/U-disk\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eAudio output: speaker sockets\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eU-disk support format: MP3, WMA, APE, FLAC, WAV...\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eU-disk capacity: max 32G\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eBluetooth version: 5.0\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eSpeaker impedance: 4-8Ω\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eMax output power: 50W*4 (4Ω load)\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eSNR: ≥98dB\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eInput sensitivity: 0.775V\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eTHD: 0.05%(1kHz 1W)\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eFrequency Response: 20Hz-20KHz(±3dB)\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eWorking voltage: DC 12-24V\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eColor: Black\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eDimensions(W*D*H): 128*134*33mm \/ 5.04*5.28*1.30in\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003eNet weight: 540g \/ 1.19lb\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003ePackage weight: 1100g \/ 2.43lb\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003ePacking List\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003e1*M4 Amplifier\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003e1*24V\/4.5A Power Supply\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003e1 Set*Raw Cable Speaker Jacks\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003e1*Manual\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\u003cp\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sb1baa76b491943e3972e11e51e56f72fs.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sec8fc2e8848e4258a68b05fdad2cbaf9V.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Saf79ffa209da487fb1e957b35d1f7975m.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S81c6ea47e48e415fa4d6d5af6d720c67J.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sd3043b19f0fc4bdab0e3d5fed5ae7305g.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sa73b7dd3023c498f820f9ee0b8b27cac2.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S9380e2c86fb1470ca0c8f719209f1b42N.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sde2d9b61fe534e1c93c67b6f3e78db103.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S84fd4b45fed84e00bab58aab209f5f84W.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae03.alicdn.com\/kf\/Sa28bd3c0fdb24070a049d1b5d3d131337.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae03.alicdn.com\/kf\/S69c247af05254b9c8649a4fad3b15807P.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cdiv\u003e\u003cdiv\u003e\u003cdiv\u003e\u003cdiv\u003e\u003cdiv\u003e\u003cdiv\u003e\u003cdiv\u003e\u003cdiv\u003e\u003cdiv\u003e\u003cdiv\u003e\u003cdiv\u003e\u003ckse:widget data-widget-type=\"customText\" id=\"16939938\" type=\"custom\"\u003e\u003c\/kse:widget\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003cbr\u003e","brand":"ElectronicsAction","offers":[{"title":"United States","offer_id":41196402802746,"sku":"200007763:201336106","price":93.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0588\/4952\/5818\/files\/Sf5611b8648674008a1d1b8b3d7249f4a5.webp?v=1768855266","url":"https:\/\/electronicsaction.com\/products\/nobsound-hifi-stereo-bluetooth-5-0-digital-power-amplifier-usb-music-player-2-4-channel-home-multi-zone-audio-amp-receiver-50w-4","provider":"ElectronicsAction","version":"1.0","type":"link"}