1, different in nature: the power amplifier is the most basic equipment in the sound system. The mixer amplifies, mixes, distributes, modifies and processes the multi-channel input signal.

2. Different functions: The function of the power amplifier is to amplify the weak signal from the sound source or preamplifier and push the speaker to make sound. A good set of audio system power amplifier plays an important role. The mixer acts as the other end of the transmission signal. Because 2 and 3 pairs of 1 have the same impedance, the impedance is lower from the input end, so it is called low impedance balanced input jack.

3. Different conduction modes: According to the different conduction modes of power amplifier tubes, power amplifiers are divided into Class A (also called Class A), Class B (also called Class B), Class A and B (also called Class AB) and Class D (also called Class D). The blender is not.

Extended data:

Precautions:

1, in the production of power amplifier, it is necessary to strictly ground, and it is better to use multi-stranded thick copper wire as the ground wire, and even double-bridge rectification and floating ground technology can be used to maximize its signal-to-noise ratio.

2. If the local power grid is seriously polluted and the low-voltage power grid is connected to electric equipment such as welding machines and silicon rectifiers, power filters can be used. If it cannot be eliminated, the transformer can be isolated by power supply, but the power should be surplus.

3. Before the newly bought power amplifier IC is put on the computer, it is best to use socket instead of welding and fix the radiator. If the power is turned on and the fever is serious, it will output DC, which can be returned to the mail order unit after being removed.

4. In order to prevent the speaker from being damaged by the DC output of the power amplifier IC, a speaker protector must be installed.

Baidu encyclopedia-mixer

Baidu encyclopedia-power amplifier