Upgraded Version Douk Audio U3 Head Mini Class A HiFi Headphone Amplifier Desktop Home Stereo Amplifier DC5V Amplifier,

Ships from Japan Adopting the original TI-NE5532 classic operational amplifier and transistor extended current circuit, using 1300mA high current output transistor operating in class A status, ultra-low distortion, the sound is warm and delicate. Adopting innovative circuit design, DC 5-20V wide input working voltage, the amplifier circuit can always operate at 26V high voltage, and the background noise index is excellent. Pluggable op amp socket design. Various op amps can be upgraded. Strong driving force can easily drive most high impedance headphones such as: HD580 / HD600 / HD650 K701 / K702 / Q701 DT880 / T70 / T90 SR225 / SR325 / RS1e Please note: Power adapter is not included. We recommend using an original, high-quality power adapter with at least 5W. For example, if you use DC 5V, the current must be at least 1A. If using a DC 12V power adapter, 0.5A or more is required. 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 Maximum output amplitude voltage: 25V Input voltage: DC 5-20V Dimensions (W*D*H): 67*93*30mm Net weight: 169g Package weight: 210g packing list 1 * U3 headphone amplifier 1*USB-DC cable 1 * 6.35mm-3.5mm headphone adapter