Douk Audio U3 Mini Pure Class A Headphone Amplifier HiFi Ultra-compact Home Desktop Stereo Amp for HD580/HD600/HD650 Headsets

 Warm tips:Not inlcude power adapter, recommend to use original high-quality power adapter above 5W. For example: the current should be above 1A if use DC 5V while need above 0.5A if use DC 12V power adapter.FeaturesAdopting innovative circuit design, DC 5-20V wide input working voltage, the amplifier circuit can always work at a high voltage of 26V, and the background noise index is excellent. With wide frequency response extension, excellent transient response, excellent purity and transparency, and good dynamic range.Adopting original TI-NE5532 classical op amp and transistor expanding current circuit, using 1300mA large current output transistor working in class A status, with ultra-low distortion, and the sound is warm and delicate, full and mellow.Pluggable op amp socket design, convenient to upgrade different op amps and bring much DIY fun and playability for audiophiles. Smooth and mellow sound, suitable for listening to vocals or string music, classic or pop music, and even with unique charm when playing rock.Mini size with exquisite appearance and most cost-effective, 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 desltop audio system use.With stong drive power, easily to drive most high-impedance headphones such as:HD580/HD600/HD650K701/K702/Q701DT880/T70/T90SR225/SR325/RS1eParameters:Audio input: stereo L/R RCAAudio output: 6.35mm headphone jack (with 6.35mm to 3.5mm adapter)Output power: ≥1300mW (32Ω)Matched headphone impedance: 18-600ΩFrequency response: 20-30KHzSignal to noise ratio: ≥110DBMax output amplitude voltage: 25VInput voltage: DC 5-20VDimension(WDH): 679330mm / 2.643.661.18inNet weight: 169g / 0.37lbPackage weight: 310g / 0.68lbPacking List1U3 Headphone Amplifier1USB to DC Cable1*6.35mm to 3.5mm Headphone Adapter