Under the condition of the dynamic range of audio source is very large, will be given the power amplifier momentary overload will cause the damage of the speaker. The output power is refers to the power of continuous work for a long time. Peak power is to point to in a short period of time under the maximum power, it is much larger than the rated power. Power amplifier output level indicator in normal display level in green; When high power amplifier requirements for continuous signals, level signal in yellow; Music in the audio signal peak or drums, the red indicator light is shining (shine), above all is normal phenomenon. If the red light has been lit, this suggests that the power amplifier may be overloaded. When the power amplifier drive all the way multi-channel loudspeaker, this often happens, should reconfigure the system at this moment, in order to eliminate the phenomenon of overload. Power amplifier PEAK indicator (PEAK), when PEAK PEAK light is bright, should gain control down. Power amplifier protection indicator light, and in some mistake operation, power amplifier built-in protection circuit will automatically disconnect, then protect displays will shine. Mistake operation after eliminating, protect the display lamp will go out. Professional amplifier in large-scale activities need to work long hours in a row, but also can withstand handling of the vibration and impact. So compared with general audio amplifier, professional amplifier are designed to pay more attention to for a long time use of structural reliability and durability. Amplifier on the amplification of sound quality has important influence. In order to give full play to the audio equipment performance and function, should attach great importance to the quality of amplifier. Otherwise, the high quality of the sound reinforcement system cannot play a role.

Amplifier is connected to the amplifier with young volunteers and amplifier device connected, must consider the impedance matching between each other (impedance in ohms per unit), impedance matching refers to the rated power amplifier output impedance shall be equal to the rated impedance of the speaker, then the power of sound absorption is the largest. If the speaker rated impedance than the rating of the amplifier output impedance, will cause the working current has increased dramatically, and damage of the speaker and amplifier. When power amplifier and speakers so be sure to note that the input impedance of the speaker must be within the scope of the load impedance of the power amplifier. Power matching principle, the rated output power of the power amplifier power rating shall be equal to the speakers, but as a result of power amplifier tube after overload will appear serious nonlinear distortion, so usually intended to raise the rated output power of the amplifier, making them outweigh the rated power of the speaker. If the power ratio of power amplifier power little too much, should be extra careful when using power amplifier, the volume should be from small to big adjustment, and not too much, otherwise it will damage the speakers. In practice, a power amplifier output power is larger, are helpful to improve quality.