1. Sound source (music playback equipment, pickup equipment is the microphone)

2. Control device (analog mixer, digital mixer, digital audio media matrix, AV digital management center)

3. Peripheral equipment (processor, equilibrium, pressure limiter, frequency division, incentive, delayer, effector, feedback suppressor)

4. Restore device (speaker or speaker system, power amplifier, that is, power amplifier).

5. Connection cable (the above devices are connected together by various types of cables and cables to form a unified sound system.)

Audio equipment has high requirements for users, and knows the functions and use of various equipment. It has professional theoretical knowledge, accurate listening ability, strong debugging level, emphasizing fault diagnosis and exclusion ability. The difficulty is to design and debug the system.