Loud Noise (Feedback?) From Speakers

[onfo]

Hello there, it has been awhile since I've posted, but this is such a great group of people I thought I would try again with a new problem.  My last post was for help configuring a setting, and I granted someone here remote access to configure my system.

Fast forward, and last night, at 3:15 am the speakers in our bedroom made an EXTREMELY loud noise that sounded like a machine gun / banging.  I immediately cut power to the system, and it stopped.  I turned it on, briefly, and the sound started again.  Any ideas what could have caused it?  Please let me know if any additional information would be helpful.  The C4 controller is a HC800.  I'm having a local dealer come out and take a look but thought I'd also post here as this group is so knowledgeable and helpful.  Thanks in advance!

[Time2Jet]

Hello there, it has been awhile since I've posted, but this is such a great group of people I thought I would try again with a new problem.  My last post was for help configuring a setting, and I granted someone here remote access to configure my system.
Fast forward, and last night, at 3:15 am the speakers in our bedroom made an EXTREMELY loud noise that sounded like a machine gun / banging.  I immediately cut power to the system, and it stopped.  I turned it on, briefly, and the sound started again.  Any ideas what could have caused it?  Please let me know if any additional information would be helpful.  The C4 controller is a HC800.  I'm having a local dealer come out and take a look but thought I'd also post here as this group is so knowledgeable and helpful.  Thanks in advance!

Can’t say this is your precise issue, but had this happen recently when the power supply of a client’s audio matrix was dying a slow death.


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[onfo]

9 minutes ago, Time2Jet said:

Can’t say this is your precise issue, but had this happen recently when the power supply of a client’s audio matrix was dying a slow death.


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Power supply? It’s plugged into a wattbox so are you saying plug it into something else? Or is the power supply internal to the audio matrix?

[Time2Jet]

Power supply? It’s plugged into a wattbox so are you saying plug it into something else? Or is the power supply internal to the audio matrix?

Internal PS. Caps go bad. But I’d like to hear others try to diagnose. I started thinking it was a bad amp, replaced to no avail. Pulled the matrix and opened to see blown caps.

Can buy replacement on eBay. I just replaced caps, but that takes some knowledge and solder skills.


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[onfo]

26 minutes ago, Time2Jet said:

Internal PS. Caps go bad. But I’d like to hear others try to diagnose. I started thinking it was a bad amp, replaced to no avail. Pulled the matrix and opened to see blown caps.

Can buy replacement on eBay. I just replaced caps, but that takes some knowledge and solder skills.


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Thanks for expanding on it. I was able to confirm this morning that the feedback noise is coming from all speakers hooked to the AM. When I turn down the level knob it diminishes but doesn't cease. 

[penn65000]

8 hours ago, onfo said:

Thanks for expanding on it. I was able to confirm this morning that the feedback noise is coming from all speakers hooked to the AM. When I turn down the level knob it diminishes but doesn't cease. 

We had c4 audio matrix. Same issue. Banging on all speakers. Replaced the audio matrix. Likely was power supply (c4 audio matrixes have this issue) but decided to replace whole thing (w triad).