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While using my xr684 for practice at home,there was a loud noise and a smell of burning electic circuit,so I turned off.a friend who used to work in the amplifier business looked at it for me and said it would be too expensive to repair,but I can still use as a mono amp(the whole row of red lights on the lower EQ are on permanently)Any suggestions for a cause or a cheap, easy,DIY repair PLEASE

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Probably one of the two amplifiers in it had a failure. It is probably economically repairable by a COMPETENT technician. I would expect several transistors have failed probably $30 if parts maximum.

I would NOT suggest using it with the failure as further damage or even a slight fire hazard might exist.

Bad or intermittent speaker cables are common cause of this type failure. Overdriving or even a bad speaker can also cause it.

Posted on Oct 07, 2009

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