Input and output are RCA lotus interface, one two-channel audio input, sets of two-channel output, can be connected to power amplifiers or active speakers, with gain compensation 2 amplification; The internal use of positive and negative power conversion circuit, the actual power supply is doubled, the operating voltage range is DC 5V-16V, and the Japanese company NJM4580 dual op amp is used. A of 6 chips are used, 1 chip is used as a gain boost, and 5 chips drive groups respectively. Stereo output, low noise and high fidelity, long-term power on and stable work; use a low-ripple power supply for power supply, pay attention to the positive and negative poles, they will burn if they are connected reversely The power interface 5.5*2.1 is positive and negative. The volume of each group is controlled separately, and the gain compensation is about 2 (6DB) Working voltage: DC5-16V, with negative voltage conversion, the power supply voltage is doubled and the dynamic range is . : Metal colour: black Package Contents: 1 x Audio Distributor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.