Question about Infinity 7540A Car Audio Amplifier

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Amp cuts out with loud volume

Ok me and every stereo guy I know is lost on this one I installed the infinity 7540a amp to my alpine CDA-9853 head unit. When my truck is running the amp cuts out from a split second to a few seconds depending how how loud the stereo is. When my truck is just on but not running it does GREAT. I have checked the ohms at all the speakers and they are correct. power is 12.3 v with out the alt and 14.4 with the alternator at the amp power connector. Someone told me to try to upgrade the power system so I took all the stock 8gauge wire out and replaced it with 1/0. Still nothing. I have called and checked to make sure that the Head unit is not putting out too much current for the amp and they place I purchased it from told me that they should be fine together. I have 4gauge power and ground wire at 0 ohms on the amp. whats getting everyone is that its fine when my altenator and motor are not running..... PLEASE HELP

Posted by James Morecraft on

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From what you describe it could be that its not getting enough power when the car is fully running. Its been a long time since I have had to deal with car audio problems. Does it happen when the vehicle is running but in park? If so it could be a short (Not likely though, it would be happening more often). Or it could be a loose connection somewhere that the vibrations of the vehicle are shaking. That would also be a problem if it happens when it moves. If it is still a problem, I would take it to a Checkers Auto. A lot of them offer free electrical testing.

Posted on Jul 02, 2006

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