1, in is input, C/SUB is bass, rear is rear surround, side is front midrange, mic is microphone jack, and out is output. C/sub orange: refers to the middle channel and bass channel of 1 or 1 multi-channel speaker. Back Black: Connect the back of 1 or 1 channel and surround the left and right channels.

2. out (output) on the amplifier means output, and in (input) means access.

3. The power amplifier has input/output. The IN behind the audio equipment generally represents the interface of audio input, which is used to connect the input signals of CD players, mobile phones, MP computers, etc. So in means input. OUT generally represents the interface of audio output, which is used to connect loads, such as speakers and headphones, so out means output.

4. On active speakers, power amplifiers and stereo systems, IN is the audio signal input and OUT is the audio signal output. If you play music with a mobile phone, the output of the mobile phone should be connected to the input socket of audio equipment (AUDIOIN/LINEIN/AUXIN, etc.). ).