{"product_id":"nobsound-u10-mini-vacuum-tube-preamplifier-hifi-desktop-3-5-6-35mm-headphone-amplifier-for-home-speaker","title":"Nobsound U10 Mini Vacuum Tube Preamplifier HiFi Desktop 3.5\/6.35mm Headphone Amplifier for Home Speaker","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\"\u003e2 (2.0)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eDOUK AUDIO Model\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eU10\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eMaximum Power Per Channel\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNO POWER\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eModel Number\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eU10\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\n\u003ckse:widget data-widget-type=\"customText\" id=\"16942927\" type=\"relation\"\u003e\u003c\/kse:widget\u003e\u003cbr\u003e\u003cspan style=\"color:rgb(231, 76, 60)\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eWarm tips:\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"color:rgb(231, 76, 60)\"\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"color:rgb(231, 76, 60)\"\u003e\u003cstrong\u003e\u003cspan style='font-size:22px;font-family:\"times new roman\", times'\u003eNot inlcude power adapter, recommend to use original high-quality power adapter (DC5V\/≥2A ). U10 won't work normally if the current below 2A.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eFeatures\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eU10 headphone amplifier with strong power:  stereo 3.5mm AUX and RCA inputs, compatible with most audio source such as MP3, phones, computers, CD players etc.. Dual headphone jacks (3.5\/6.35mm) output up to 1100mW, easily to drive all 18-600Ω headphones; U10 also can be used as a preamp to improve the sound quality for amplifiers or active speakers.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eAdvanced design and HIFI sound: innovative built-in voltage boost circuit, U10 always works at a high voltage of 24V even only powered by DC 5V, the sound with deadly quiet background, amazing purity and transparency, accurate position and wide sound field, easy use and unrivalled sound are both achieved at the same time.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003ePluggable design with higher playability: 2PCS 6A2 tubes are adopted to soften and warm the audio, sounds real and natural, full and mellow, delicate and sweet. Both tubes and op amps are designed with pluggable socket, convenient for tube rolling, op amp upgrading and sound-shaping, different styles of sound can be enjoyed easily.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eExcellent manufacturing and most cost-effective: all metal case with good shielding, pure ceramic tube socket with antioxidant contact etc., U10 provides excellent sound and strong power for your headphones in such a mini size, specially suitable for the audiophiles who love listening to vocals, string music, light or classic music etc..\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eWarm tips:\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003e1. Inputs (3.5mm \/ RCA) and outputs (6.35mm\/3.5mm jack) are connected in parallel, in other words, all inputs and outputs work simultaneously. Don't connect 3.5mm and RCA inputs at the same time, or else audio signals will be mixed.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003e2. Pluggable tube socket design, 6A2 can be replaced by the following models:\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left:40px\"\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003e6J1,6ж1П,6AK5,6BC5,403A\/B,5654,EF40,EF95,CV850,6J2,6ж2П,6AS6,CV2522,EF11\/732,CV4011,6J3,6ж3П,EF96,CV848,6BC6,6AG5, 6J4,6ж4,6136,6BX6,6AC7,EF94,6AU6,6K4,6K5,6K4П,6BA6,6DA6,EF89\/93,5749\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003e3. U10 can easily drive all headphones even with high-impedance such as HD580\/HD600\/HD650 \/ K701\/K702\/Q701 \/ DT880\/T70\/T90 \/ SR225\/SR325\/RS1e etc.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eParameters:\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eModel: U10\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eAudio input: 3.5mm AUX \/ Stereo RCA\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eAudio output: 3.5mm \/ 6.35mm headphone jack\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eTube Model: 6A2 (2PCS)\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eOp amp model: NE5532 (2PCS)\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eFrequency response: 20Hz-30KHz\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eOutput power: ≥1100mW (32Ω)\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eMatched headphone impedance: 18-600Ω\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eSignal to noise ratio: ≥110DB\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eInput voltage: DC 5V (≥2A)\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eWorking voltage inside: DC 24V\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eNet weight: 200g \/ 0.44lb\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003ePackage weight: 300g \/ 0.66lb\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003eDimensions (W*D*H): 69*95*30mm \/ 2.72*3.74*1.18in (not including tubes)\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003ePackage Dimensions (W*D*H): 132*85*90mm \/ 5.20*3.35*3.54in\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:22px\"\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\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003e1 × U10 Headphone Amplifier\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003e2 × 6A2 Tube\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003e1 × Acrylic Board\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\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\u003cli\u003e\u003cp\u003e\u003cspan style=\"font-size:22px\"\u003e\u003cspan style='font-family:\"times new roman\", times'\u003e1 × User Manual\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\/S3e6daceb7ff84e97bcc5b6754e7eadeeF.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S46a9ffe5f8864e86bf5d58e54d100d11B.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sfa5d1af80909478fbebc51ed76cc14cdA.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae03.alicdn.com\/kf\/S3f2b98565cd34b9eae243a03bbc05b90Q.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S1974c964093e47f9a9a7cbce648d111cY.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sc9dd325afb7f4f15a83ec222b905f5f8T.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S0d5390cfb03d4cdfbd120a92eda1ce3d6.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S79d3411a055e4571a853209dbccf66fbn.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sfc061264471741469d1be475aa24afa9t.jpg?width=1600\u0026amp;height=1600\u0026amp;hash=3200\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\n\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\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Global Electro Hub","offers":[{"title":"United States","offer_id":67999929335959,"sku":"200007763:201336106","price":71.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/7184\/1687\/files\/S8baa673b64064ae9b5d6b8ddbaafe03a5.webp?v=1790976092","url":"https:\/\/globalelectrohub.com\/products\/nobsound-u10-mini-vacuum-tube-preamplifier-hifi-desktop-3-5-6-35mm-headphone-amplifier-for-home-speaker","provider":"Global Electro Hub","version":"1.0","type":"link"}