1. Sound source: The source of sound. The common audio sources in the home audio system include box recorder, CD machine, LD machine, VCD machine and DVD machine.

2. Elimination equipment: In order to effectively launch speaker sounds effective high power, the signal of the sound source output generally needs to be magnified. The common amplification equipment is an AV amplifier, which is generally a transistor amplifier.

3. Returning sound equipment: that is, speakers, the quality of its performance will directly affect the listening effect.

4. Connection line: Includes the connection line from sound source to amplifier and the connection of the amplifier to the speaker.