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

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. Features Adopting 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/HD650 K701/K702/Q701 DT880/T70/T90 SR225/SR325/RS1e Parameters: Audio input: stereo L/R RCA Audio output: 6.35mm headphone jack (with 6.35mm to 3.5mm adapter) Output power: ≥1300mW (32Ω) Matched headphone impedance: 18-600Ω Frequency response: 20-30KHz Signal to noise ratio: ≥110DB Max output amplitude voltage: 25V Input voltage: DC 5-20V Dimension(W*D*H): 67*93*30mm / 2.64*3.66*1.18in Net weight: 169g / 0.37lb Package weight: 310g / 0.68lb Packing List 1*U3 Headphone Amplifier 1*USB to DC Cable 1*6.35mm to 3.5mm Headphone Adapter