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

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 x D x H): 67 x 93 x 30mm Net Weight: 169g Package Weight: 210g

Packing List 1 * U3 Headphone Amplifier 1 * USB-DC Cable 1 * 6.35mm to 3.5mm Headphone Adapter Equipped with the original TI-NE5532 classic op amp and transistor-enhanced current circuit, this amplifier uses 1300mA high-current output transistors operating in Class A status, resulting in ultra-low distortion and a warm, delicate sound. The innovative circuit design features a wide DC 5-20V input operating voltage, allowing the amplifier circuit to operate at a constant high voltage of 26V, resulting in excellent background noise performance. The pluggable op-amp socket allows for upgrades with a variety of op-amps. The powerful driving power easily drives most high-impedance headphones, including: HD580/HD600/HD650, K701/K702/Q701, DT880/T70/T90, SR225/SR325/RS1e. Please note: A power adapter is not included. We recommend using an original, high-quality power adapter with a 5W or higher output. For example, when using a DC 5V power adapter, the current must be 1A or higher. When using a DC 12V power adapter, the current must be 0.5A or higher.