Nowadays, constant voltage power amplifiers can be seen everywhere in life, such as school radios, community radios, etc. These broadcast systems are all constant voltage power amplifiers. How to connect the constant voltage power amplifier? Today, the editor of TEANMA talked about it.
Constant voltage power amplifier is also called broadcast power amplifier . It is a high voltage output broadcasting equipment (120V, 240V is mostly used in China). The wiring method is to connect the primary end of the transformer between all speaker wires and the 120V output of the power amplifier (that is, all in parallel ), The total power of the speaker should not exceed the rated power of the amplifier. It should be noted that if the speakers are relatively close, the phase of the speakers should be kept the same, that is, all the positives are connected to the positive, and the negatives are connected to the negative.
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 connected in parallel directly to the output of the power amplifier; this power amplifier The connection terminals must be connected to the 100V terminal. There are no pictures of the terminals of the speakers, so it is only introduced according to experience. Most of the constant pressure speakers have two voltages of 70V and 100V. Take the two terminals on the top, that is, It's 100V. 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 use a multimeter to measure it. The two resistors with a large resistance are 100V.
sp1-sp5 is generally expressed as zone output. The machine panel should have corresponding switches. Using this function can broadcast each grade of the school separately, of course, it can also broadcast to each floor of the mall. The words under the terminal are not clear, please read the instruction carefully. As a constant-voltage broadcast, you must buy a constant-voltage speaker to match it. Because the ceiling and wall-mounted speakers commonly used in the market are mostly 120V (100V), the output broadcast line must be connected to 0V and 100V.
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