speakers work by amplifying sound from the connected component device. Most of these speakers have a woofer, mid-range drivers and a tweeter. They vary in size, power, and design. However, they work the same way. As sound moves into the speaker through a cable, the sound is directed to the appropriate driver. The input frequency is converted into mechanical movement. Consequently, the cone moves accordingly, pushing the air around it to produce sound.

Sometimes problems will surface during set-up or sound-check, and occasionally during the performance itself. Even in fairly basic PA systems there are plenty of opportunities for something to go wrong: leads can get pulled loose, batteries (even new ones!) can die unexpectedly, and amplifiers can overheat and shut down.

There are many problems can occur for a PA box system. here are some common ones,

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