With the development of society, the application range of broadcast sound reinforcement system is getting wider and wider. Sound reinforcement system is divided into constant pressure sound reinforcement system (public broadcasting system) and constant resistance broadcasting system (professional audio, conference sound reinforcement system). Fixed resistance broadcasting systems are generally places with high sound quality requirements, such as conference systems, stage sound systems, and KTV sound systems. Constant pressure amplifiers can be seen everywhere in life, such as campus radio, community radio, etc., rural radio and so on. How to connect the PA system wiring?

       Constant voltage power amplifier, also known as broadcasting power amplifier, is a broadcasting equipment with high voltage output (mostly 120V and 240V in China). ), the total power of the speaker should not exceed the rated power of the amplifier. It should be noted that if the distance between the speakers is relatively close, the phase of the speakers should be kept consistent, that is: if the positive is connected, all the positives are connected, and if the negative is connected, all the negatives are connected.

       The connection of the constant pressure audio system is very simple: as long as the input voltage of the speaker matches the output voltage of the power amplifier, and the total power of the speaker does not exceed the total power of the power amplifier, the speakers can be directly connected in parallel to the output of the power amplifier one by one; this power amplifier The terminal of the speaker must be connected to the 100V terminal. There is no picture of the terminal of the speaker, so it is only introduced according to experience: most of the general constant pressure speakers have two voltages of 70V and 100V. Take the two terminals on the side, which is 100V Now, it is estimated that the red wire is the 100V terminal, and the rest is the one on the other side. If you really can't figure it out, you can measure it with a multimeter, and the two with the largest resistance are 100V.