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My turbo sound active speakers continue to fail.

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DonnyCooper:
Hello. I work at Gertie’s, the casino in Dawson City, Yukon Canada. We’ve had a Turbosound PA installed for about six years. This year we had a brand new, beautiful lighting rig professionally installed. However in the last five months our turbosound tops have succumb to the same problem multiple times. I have a basic level of electronic repair understanding and have done the visually obvious repair a few times.Something is burning out the same transformer solder points on the AC side. I’ve attached pictures and I’m looking for insight. This is happening too often to be a coincidence.

Mike Caldwell:
Maybe the trace is not large enough to handle the current?

Have to jumper the trace with a piece of wire?

Brian Jojade:
Have you checked your supply voltage?  A lower supply voltage results in higher current draw as the power supply compensates and sometimes that will push gear beyond its capabilities and cause premature failure.

Jim McKeveny:

--- Quote from: Brian Jojade on September 10, 2022, 09:02:32 PM ---Have you checked your supply voltage?  A lower supply voltage results in higher current draw as the power supply compensates and sometimes that will push gear beyond its capabilities and cause premature failure.

--- End quote ---

This is a common class D amp failure situation (if these are class D amps). The compensation for voltage sags is slow to normalize as voltage returns, resulting in overvoltage situations not designed-in. Class D's are a work-in-progress, but the wiser manufacturers have made great adjustments as fresh data emerges.

Patrick Tracy:
Out of curiosity, which Turbosound speakers? They don't appear to be Milan, iQ or iX (looking at the flown speakers in the photo).

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