The audio system consists of multiple components, including:

1. Putting ahead of the front: amplify the input signal and transmit it to the sound barrier or speaker in front.

2. Midtone amplifier: Located in the central position of the sound barrier or speaker in the front, enlarge the input signal and balance the signal.

3. Rear amplifier: Located at the rear or side, amplify the input signal and balance the signal.

4. Speaker: Convert audio signals to sound wave output.

5. Sound barrier: separate indoor space to prevent sound reflection and spread.

6. Sound sound insulation material: reduce the interference of sound transmission of external noise.

7. Equalist: Balance input and output signals make it sound more balanced.

8. Mixing device: Mix different music signals to spread wide sound on multiple speakers.

These components can be combined to create a complete audio system. Different types of sound systems have different components and design, such as home audio systems, cinema audio systems, etc.