Audio equipment is a system, including many related equipment. These devices are used in combination according to the actual situation. So what we see in different environments will be different, and the choice of combination mainly depends on whether it will be used. For example, for general conference activities, you don't need to use a mixer to encode the sound, so you don't need to buy it when you actually install it. Similarly, if you don't need to influence the sound, then the effector is unnecessary.

The classification of audio equipment can be roughly divided into digital category, combination category, professional category and mini category. Digital audio is recorded by binary coding, which has the characteristics of low distortion, good repeatability and easy integration. It is a widely used audio system. Moreover, because it is recorded by binary code, it can be used in many hardware devices and has very strong adaptability. Generally, this kind of audio equipment can be used in digital cinemas and digital recording studios. Generally speaking, there are two combinations: desktop combination and ground combination.