Question about Sony XM-475GSX Car Audio Amplifier
First you need to determine if the amp is defective or if something else is causing it to go into protection, most often a short in the sub or amp wiring.
Disconnect the sub(s) from the speaker output terminals and the RCA inputs from the head unit, and test if the amp powers up OK. If it does, the problem is in the sub(s) wiring or voice coils, or in the RCA inputs to the amp. Reconnect each one-at-a-time to determine exactly where the short is and repair or replace the defective wiring or unit. If it doesn't power up with the inputs and sub(s) disconnected, the amp itself is most likely defective.
Hope this helps.
Posted on Jul 16, 2009
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Posted on Jan 02, 2017
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