5.1 The internal chip of the power amplifier board adopts LM1875x6 ( disassembler) as power amplification, with analog 5.1 conversion, 6 lotus heads connected to 6 channels of input, and can also receive two channels of analog signal input. 5.1 channels each channel works independently, 4 white plugs, and 6 channel speakers (2 of them are 3 plugs, and the two speakers share a negative electrode) Chip Name: LM1875 (disassemble, but work well) Rated power: 25Wx6(5.1-channel power amplifier board 25Wx6 (each channel works independently, subwoofer output) Working voltage: dual AC12-18V<br><br>Signal to noise ratio: 86dB Distortion: less than 0.01% Frequency response: 20Hz-20KHz Instructions for use: When you do not output 5.1-channel playback devices, only mobile devices such as mobile phones, computers, MP3 players, etc., you only need to input two main channels and turn the switch to the surround position to output the analog . 5.1 channel. All speakers have sound. Conversely, when the 5.1 channel signal is input, the switch can be set to the channel position. Colour: green Material: PCB Size: 78x162x45mm<br><br>Package Contents: 1 * Amplifier<br><br>Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.