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PA Speakers spark? Advise Please!
PA Speakers spark? Advise Please!
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Old 3rd September 2007, 04:30 AM   #1
htgeek is offline htgeek  United States
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Join Date: Aug 2004
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Default PA Speakers spark? Advise Please!

Hey everyone. I've got a single Peavey PR15 that I was using to run vocals for a local rock band. The mic fed-back really loudly at one point during a practice and I happened to have my eyes on the speaker at the time. As the volume of the feedback whine got louder, a bright white light grew brighter from inside the speaker cab. I could see the light from one of the sound hole in the front of the cab, as it was coming from the inside. The entire feedback lasted about 1 second, but this light was no flash - it almost looked as if there was some sort of lightbulb growing brighter inside the cab. The speaker seemed to work fine after that and I have not taken it apart yet to look at the inside. It is a 400W speaker being run with a 500W power amp that was cranked up about halfway.
Was this a spark? Was it frying electronics? Has anyone heard of this happening before? Should I be worried for my speaker now? Any help is great!
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Old 3rd September 2007, 07:32 AM   #2
Foxx510 is offline Foxx510  Australia
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Join Date: Nov 2006
It was most likely a light globe, the crossovers in the speakers are set up to dump excess power into the globe to protect the driver when you overdo it. It should be fine.
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Old 4th September 2007, 12:32 AM   #3
htgeek is offline htgeek  United States
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Join Date: Aug 2004
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ohhhhhhh, that makes sense.
it did look just like a bulb lighting up in there, but i pictured an arc or something.
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Old 4th September 2007, 01:12 AM   #4
rcavictim is offline rcavictim  Canada
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Join Date: Jun 2004
Location: Next to an open wormhole NW of Toronto
Did it cast a shadow image of the Virgin Mary? If so forget practising music for a living, you can sell tickets to touch the speaker. Be prepared to be inundated with the lost, the hopeless and the pathetic. From a marketing standpoint they are in unlimited supply thanks to the good work of the church, and god just keeps making more.

On the other hand, if it cast a shadow of the logo for Virgin Records, you are outa luck. Back to work for you!
"There are more worlds than the one you can hold in your hand." Albert Hosteen, Navajo spiritual elder and code-breaker, X-Files TV Series.
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