{"product_id":"nobsound-u3pro-hifi-headphone-amplifier-class-a-mini-desktop-amp-for-headsets-dc5v","title":"Nobsound U3PRO HiFi Headphone Amplifier Class A Mini Desktop Amp for Headsets DC5V","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\u003eBuilt-in Battery\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNo\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\"\u003e2 (2.0)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eHign-concerned Chemical\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNone\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eInput Type\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eLINE IN (AUDIO IN),RCA\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eModel Number\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eU3PRO\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\u003eOutput Type\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eLINE OUT (AUDIO OUT)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eRecommended Headphone Maximum Impedance\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e501-600 Ohm\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eType\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMini Amplifier\u003c\/span\u003e\u003c\/p\u003e\u003cdiv class=\"detailmodule_html\"\u003e\u003cdiv class=\"detail-desc-decorate-richtext\"\u003e\n\u003cdiv\u003e\n\u003ckse:widget data-widget-type=\"customText\" id=\"16942927\" type=\"relation\"\u003e\u003c\/kse:widget\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eFeatures\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli style=\"line-height:1.5\"\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eEnhanced Compatibility: with 3.5mm AUX\/stereo RCA input and 3.5mm\/6.35mm headphone jack output, the U3 PRO is compatible with a wide range of audio sources, including MP3 players, iPods, smartphones, tablets, computers, and CD players etc. Its output can connect to various headphones, offering a versatile listening experience with support for most headphone models.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:1.5\"\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eBuilt-in Voltage Boost Circuit: adopting innovative circuit design with built-in voltage boost circuit, the amplifier circuit can always work at a high voltage of ±14V even only powered by DC 5V, and the background noise index is excellent. With wide frequency response extension, excellent transient response, excellent purity and transparency, and good dynamic range.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:1.5\"\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eExceptional Output Power: for a total power output of up to 1500mW under a 32Ω load, U3 PRO can easily power headphones with any low or high impedance (18-600Ω). Working in class A status, with ultra-low distortion, the sound is warm and delicate, full and mellow with outstanding sound quality. \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:1.5\"\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eClassic OP+BUF Architecture: U3 PRO adopts OP42 and BUF634, featuring a pure DC amplification circuit. Pluggable op amp socket design, OP42 can be replaced by OP17, AD797, AD843, AD847, and OPA627, convenient to upgrade different op amps and bring much DIY fun and playability for audiophiles. \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:1.5\"\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eHighly Cost-Effective: mini size with exquisite appearance, brings big surprise for all audiophiles, easily to drive most headphones in the market, providing larger power, better sound field and details, very suitable for home\/office desktop audio system use.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"line-height:1.5\"\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eWarm tips:\u003cbr\u003e1. Without DC 5V power adapter, please prepare an original high-quality power adapter yourself (DC 5V ≥1A). Note: the input voltage over 5V will result in damage.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"line-height:1.5\"\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003e2. The U3 PRO won't work well if the current of power adapter is below 1A.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"line-height:1.4\"\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003e\u003cspan style='font-family:\"Times New Roman\"'\u003e3. The 3.5mm and 6.35mm headphone jack can output at the same time. Please don't use RCA and AUX input at the same time, otherwise audio mixing will be caused.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eParameters:\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli style=\"line-height:1.5\"\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eAudio input: stereo L\/R RCA, 3.5mm AUX\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:1.5\"\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eAudio output: 3.5mm\/6.35mm headphone jack\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:1.5\"\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eOutput power: ≥1500mW (32Ω)\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:1.5\"\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eMatched headphone impedance: 18-600Ω\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-family:\"times new roman\", times'\u003eMax output amplitude voltage: ±14V\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:1.5\"\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eFrequency response: 20-30KHz\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:1.5\"\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eSNR: ≥110DB\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:1.5\"\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eInput voltage: DC 5V(≥1A)\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:1.5\"\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eDimension(W*D*H): 68*92*32mm\/ 2.68*3.62*1.26in\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:1.5\"\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eNet weight: 164g \/ 0.36lb\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:1.5\"\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003ePackage weight: 300g \/ 0.66lb\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003ePacking List\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"line-height:1.5\"\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003e1*U3 PRO Headphone Amplifier\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli style=\"line-height:1.5\"\u003e\u003cp\u003e\u003cspan style=\"font-size:24px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003e1*USB to DC Cable\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin:0px;margin-bottom:0px;margin-top:0px;margin-left:0px;margin-right:0px;display:block;width:100%\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S107185b712f64a67973d10dcd0abf5dfH.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S4d4a0d14b72844ceafe4645db27938e5u.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S120e6dad6c13483e91f2ad349bdbd61bV.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sb92b6376e93948a29cde9ba4a89c72843.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S211050c8a4244fceb5569e9fb1f4c40di.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S6a099e4afa224ddc849a717c66755ffeu.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S35a01941f93b40d0ac70678643d51fb62.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S6db741de2e8642cfbeae1b2424564d20Q.jpg\" slate-data-type=\"image\"\u003e\u003cbr\u003e\u003ckse:widget data-widget-type=\"customText\" id=\"16939938\" type=\"custom\"\u003e\u003c\/kse:widget\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003cbr\u003e","brand":"East Supplier Platform","offers":[{"title":"United States","offer_id":47392608846047,"sku":"1005007803792029-United States","price":104.78,"currency_code":"USD","in_stock":true},{"title":"UNITED KINGDOM","offer_id":47392608878815,"sku":"1005007803792029-UNITED KINGDOM","price":104.46,"currency_code":"USD","in_stock":true},{"title":"GERMANY","offer_id":47392608911583,"sku":"1005007803792029-GERMANY","price":126.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S4faea7b5b2fd46c6ba200de3b36041c9l.webp?v=1757126587","url":"https:\/\/eastsupplier.com\/fr-jp\/products\/nobsound-u3pro-hifi-headphone-amplifier-class-a-mini-desktop-amp-for-headsets-dc5v","provider":"EastSupplier Platform","version":"1.0","type":"link"}