Audio Systems: Live Speakers, power amp, process of elimination


Question
How are you doing? I've been having this problem at my Church lately, once in a while the sound all of the sudden gets cut out, as if the speakers gave up or something, I have to raise up the volume a lot so that they can start up again and we recently bought a new mixer, so I know it's not the mixer, what do you suggest it could be?

Answer
Well, it certainly could be the mixer!

In fact, it could be any part of the system including the speaker system that you are using.  So, you have to do some testing and analyzing.  It could be the microphone itself.  The cable or connectors from mic to mixer; the mixer; the power amp; the wiring from mixer to amp; wiring from amp to speakers, etc.

Do you have an alternate mic?  That would be the first thing to check.  Just use another mic and see if the problem goes away (microphones are famous for this, especially those that are battry powered condensor type).  Then, next, replace the cables/connectors from mic to mixer.  If the mixer is a long way distant take the mic on a short cable directly to the mixer for testing purposes.

Check and recheck all the cables, wires going from one to another.  Wiggle the wires and connectors to see if you can induce the sound level reduction.  Bang on the mixer for the same purpose.  If you have alternate speakers, test them for same.

In other words, by trial and error, and process of elimination, you must determine where the problem is.  Once you have identified more specifically what is causing it I can help you further.  

In the next question give me the make and model of all the parts; mic, mixer, amp, speakers and how many and how the system is installed and I can be more clear about how to check deeper.

C