{"product_id":"zishan-ad-iii-ad3-ocl-portable-rechargeable-tube-bile-tube-amp-class-a-headphone-amplifier","title":"Zishan AD III AD3 OCL Portable Rechargeable Tube Bile Tube Amp Class A Headphone Amplifier","description":"\u003ch1\u003eSPECIFICATIONS\u003c\/h1\u003e\u003cp\u003e\u003cspan\u003eBluetooth\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNo\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eBody Material\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMetal\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eBrand Name\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eFENGRU\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eBuilt-in Battery\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eYes\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eCertification\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNONE\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eDSD (Direct Stream Digital)\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNo\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eDimensions (WxHxD)\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e80mm*58mm*24mm\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eHigh-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)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eModel Number\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eAD3,S105\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOperational Amplifier Chips Model\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eLM4562\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\u003eOutput Voltage\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e850mW\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003ePCM\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNo\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003ePackage\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNo\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eRecommended Headphone Maximum Impedance\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e251 - 300 Ohm\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSignal To Noise Ratio\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e95dB\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\u003cp\u003e\u003cspan\u003eWIFI\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNo\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003e\u003cstrong\u003eSuitable Headphone Impedance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003eDesigned to handle headphones with a maximum impedance of 251-300 Ohm, ensuring optimal sound quality.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003e\u003cstrong\u003ePortable Design\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003eThe Zishan AD III AD3 OCL is a compact, portable headphone amplifier, perfect for music lovers on the go.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003e\u003cstrong\u003eVersatile Input Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003eWith LINE IN (AUDIO IN) capability, this amplifier can connect to various audio sources for versatile listening.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003e\u003cstrong\u003eRechargeable Battery\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003eEquipped with a built-in battery, this amplifier ensures uninterrupted audio enjoyment wherever you are.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003e\u003cstrong\u003eHigh-Quality Materials\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003eCrafted from durable metal, this amplifier combines longevity with sleek aesthetics.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"text-align:center\" align=\"center\"\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003e\u003cstrong\u003eZishan AD III AD3 OCL Portable Rechargeable Tube Bile Tube Amp Class A Headphone Amplifier\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003eThe new AD III OCL, tube interchangeable amp amp, is currently a mini portable amp amp on the market.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003e\u003cbr\u003eThe latest improved version of AD III OCL 04, improves the reliability of the output relay.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003e\u003cstrong\u003eAD III OCL version\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003eThe circuit structure is a double three-stage tube, common cathode amplification plus op amp buffer output. The electronic tube and the op amp are indispensable under working conditions. Both the electronic tube and the op amp are involved in the amplification work.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003eThe AD III OCL sound-to-noise ratio is quite good, reaching a level comparable to traditional pure integrated IC portable amps.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003eAD III OCL bile amp, the circuit structure is straight-coupled output, straight-coupled output can reduce the impact of the output DC blocking electrolytic capacitor on the sound quality, reduce the electrolytic capacitor staining of the sound quality and excessive artificial modification. The sound quality is more pure, transparent and natural.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003eThe power supply voltage of the bile duct of this machine is up to 30V, and the BC100UF filter pond. Op amp supply voltage +\/- 12V, 220UF filter pond.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003eSecond, electronic components\u003cbr\u003e\u003cbr\u003e1. The resistors used in the machine are all VISHAY wafer cylindrical resistors to ensure sound quality. The low temperature drift is 0.5%.\u003cbr\u003e2. Volume control potentiometer, 09 type potentiometer.\u003cbr\u003e3. Input coupling capacitor, Italian AV, Promise special capacitor\u003cbr\u003e4. Power filter capacitor, Philips BC\u003cbr\u003e5. This machine adopts an imported fever SYLVANIA 6021 double tertiary tube to amplify the signal, the internal resistance of the tube is very low, the amplification linearity is ideal, and the service life is long. The tone is clear and transparent, delicate and round, and the music is full of flavor.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003eThe op amp adopts LM4562, of course, you can also replace and upgrade the op amp IC you like or more. Replacing the op amp IC by itself can allow users to improve the playability and fun of the machine and the sound quality of better performance.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003eThe pure Class A single-ended circuit is simple but the sound is extraordinary. Sound characteristics: warm, transparent mid to high frequencies, powerful low frequencies, good separation and dynamics. Actually only know after hearing it.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003eThe Class A single-ended sound is noble and charming, with a strong musical taste, excellent performance with low distortion and wide frequency response, warm vocals, rich details, strong and powerful bass, and large dynamic range\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003eWhen charging the phone, just use the 5V charger of the mobile phone. Full charge is about 4 hours, and the working life of the amp is about 5 hours. Support to listen and use while charging.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003e\u003cstrong\u003eBasic parameters:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003e\u003cbr\u003eEndurance ---------------------------About 5 hours 32 Euros\u003cbr\u003eFrequency response range----------------------20HZ--42KHZ\u003cbr\u003eTND----------------------------%0.015 1khz\u003cbr\u003eS\/N ----------------------------95dB\u003cbr\u003eOutput------------------------850mW\u003cbr\u003eLoad range----------------------16Ω\/400Ω\u003cbr\u003eDimensions of measurements--------83*57.*24 (without knob)\u003cbr\u003eCharging ------------------------5V1A\u003cbr\u003eConfiguration ---------------------------- The machine is equipped with one AD III OCL machine, one 12CM pair recording cable, and one USB charging cable. Two straps.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"trebuchet ms\", helvetica, sans-serif'\u003e\u003cstrong\u003eItem Pictures:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/H34f179ae7e3a4063915ab0ee6f61c6b8i.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/H37598c71efbf46a8bd1aab9c2938b831G.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/H26d501b92eac48e08d7555cb438653f5K.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/H4ab0eb0d4d6d46839d75afda4802ae03X.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/H25968548cf284a77a188df7582009e01s.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Hc2a707ed3d0848cfaf9efec21e469086O.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Hf8f52841bcc148eaa819a96cbe85b586j.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Hfc5f20766498482ba24923fb9dcf1ef08.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/H36bed3c7d30d4bfd91337fe37d7bf193Y.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/H7b1a7154c6fe4d9d8189d0ee5b1cd1824.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Hc0f06fb98ae74871bc66a7b689cd1c003.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/H44f75658a4154c729a162a9644d4f7b6c.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/H6fc22afc50594e7f93688f143660c1f3Z.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/H677e662e2102496aa04f1c535ad301e4r.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/H961cc5040a5942799862a06947779403c.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/H12e807b16fe34f24a6bc8ec2c68cee40C.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e","brand":"pumachip","offers":[{"title":"Default Title","offer_id":50463821660300,"sku":"\u003cnone\u003e","price":104.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/6212\/7244\/files\/He8d46e383dcb4801a5073de86fd96d3dg.webp?v=1780621775","url":"https:\/\/pumachip.com\/products\/zishan-ad-iii-ad3-ocl-portable-rechargeable-tube-bile-tube-amp-class-a-headphone-amplifier","provider":"pumachip","version":"1.0","type":"link"}