The public address system equipment is generally installed in the cabinet. If it is a very simple system cabinet, it is likely to select a smaller one, such as a 1.0-meter cabinet. The equipment is relatively small and the cabinet is relatively low. The equipment should be used up as much as possible. The automatic broadcast program server should be placed on the top as a frequently used and frequently adjusted equipment for convenient adjustment and application. Then install wireless microphone preamplifier, power amplifier, etc.
If there are many broadcast program equipment and the cabinet is high, such as a 2.0-meter cabinet, the frequently used broadcast program equipment should be placed at a position of 0.8-1.5m. Too high and too low is not conducive to practical operation.
2 Equipment connection sequence
Connect the computer full-automatic broadcast program server, and the AUX line is generally immediately connected to the input of the preamplifier or the first safe channel of the mixer. The output audio frequency of the mixer is distributed to each power amplifier. If the pure post-stage Electronic amplifier is connected to the INPUT audio input, the power amplifier is output to the addressing mode terminal equipment, the regional control cabinet or the system partition device, and then to the audio speaker of the terminal equipment.
3 Common cabling problems
If the public address system has a lot of wiring, and the power plug is used as the AUX cable and the power plug is used as the power plug, it is better to use the cable from two manufacturers to facilitate the difference. Before wiring, the design scheme can be done well before wiring together. If the wiring is completed and the number of wires is found to be missing, it is equivalent to the revision of all engineering projects.
4 Equipment power supply system
For the public address system, try to configure a dedicated power sequencer for the equipment power supply system, which can ensure the unified management method of the power supply system and the consistent starting order of the equipment. The main switch power supply must have a grounding wire, which can maintain the service life of the public address system equipment and prevent various accidents caused by static induction to personal safety.
5 Equipment purchase
All goods need not only look at the appearance, but also depend on the feedback of other users and market share. A good manufacturer's products have been tested and tested several times. A manufacturer with work experience, a company with many years of production and manufacturing experience, and a product recognized by many enterprises must be a good product.
6 Selection of connecting wire
For the application of the connecting line, you can buy some connecting lines by yourself according to the situation. Some connecting lines are connected by the way of the adapter. After a long time, there will be unstable contact. We hope that when we do the system integration, we can weld as firmly as possible, which will save ten times and thousands of times of work for after-sales service and maintenance.
7 Installation of cabinet
If the public address uses the pure post-stage power amplifier, the PA power amplifier is relatively deep, and the installation of the 600 * 600 cabinet must be earlier, or the box ruler must be used to accurately measure the front and rear left and right spacing of the lower cabinet pole.
As a system problem, public address must be comprehensively considered in the system design. On the basis of selecting the electroacoustic equipment with good characteristics, according to the careful system design scheme, careful system adjustment and excellent sound construction standard, the sound quality of the dial-up sound is beautiful and of course.
