Question about Logic Soundlab CPX1820 Car Audio Amplifier

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Amp go's into protection

When you turn on the car the stereo turns on and then the amp, it comes on real quick then gos into protection.no sound comes on at all

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  • Terry Thompson Mar 11, 2008

    i have the same problem to but it also does it when i plug in my rca cabels

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Old post but your transistors might be blown

Posted on Apr 03, 2012

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Bad ground make sure you have a really good ground

Posted on Feb 07, 2008

  • James wood
    James wood Feb 08, 2008

    oh yeah you need it on like the body of the car and if there is paint or rust make sure you scrape it away really good were the ground wire touches

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My amp turns on and off


Sounds like there could be a short somewhere. Check to make sure that there aren't any (exposed/bare) wires touching each other or if there is a bare spot of wire touching something metal. Check both ends of all the wires. A speaker wire may have come lose and is shorting out against the frame or some other place. Usually if it goes straight into protection mode or you're popping fuses you have a short somewhere. I assume the capacitor you installed is somewhere on the power line, which would be for helping with
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Disconnect all speaker wires and signal cables from the amp. If it powers up normally (doesn't go into protection), the wiring needs to be checked. If it still shuts down, the amp likely has blown output transistors.

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