The audio system refers to converting the sound wave signal of the original sound field sound with a microphone into a electrical signal, and the electrical signal is processed through some electronic devices according to certain requirements. Finally The entire composition from a speaker to a speaker is the audio system. Among them, the speaker and the speaker are called converters. Although the electrical signal in the audio system is different from the sound signal of the sound waves in the form and outline of the energy system, as a signal, the essence of the information between them is consistent, that is, their amplitude has a relatively large corresponding relationship. The frequency is also corresponding, so the electrical signal in the audio system is in the sound frequency range of 20Hz ~ 20000Hz in the frequency, which is called audio signal. Audio signal, this is an important feature of the audio system.

Although there are different audio systems according to different requirements and tasks, and different occasions, and the same type of sound system is also different from the amount of functional function and size, the design of the audio system has a common design design together The law. The composition of the professional audio system is generally used as the center of the tuning deck, and the ins and outs of the sound signal is grasped. The rear -level device is based on the system's different or from the recording device or to the soundpowering equipment. For the home audio system, the center of the front amplifier (front placement) is grasped to connect.