Sound refers to other sounds besides human language and music, including the sound of the natural environment, the sound of animals, the sound of machine tools, various sounds made by human actions, etc. The sound probably includes a set of power amplifier, peripheral equipment (including compressor, effector, equalizer, VCD, DVD, etc.), speakers (speakers, speakers), mixer, microphone, display equipment, etc. Among them, speakers are sound output devices, speakers, subwoofers and so on. A loudspeaker includes three types of speakers: high, low, and medium, three but not necessarily three. The development history of technology can be divided into four stages: electron tube, transistor, integrated circuit, and field effect tube. So how is the audio circuit board wired?
Audio circuit schematic 
Multimedia audio circuit diagram 
The 2-pin socket connects the left and right outputs to the speaker LOUT ROUT. Refer to the illustration for the input power pin.
Audio circuit board wiring diagram1. First of all, you should go to the electronic accessories city or the Internet to buy a power amplifier circuit board with matching sound.
2. Know the power supply and switch of the power amplifier board.
3. Connect the exercise board and the speaker with wires.
4. Connect the circuit of audio and power amplifier board.
5. Connect the computer audio cable to test the sound.
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