Question about JBL GTO75.4 Car Audio Amplifier

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My Jbl mono amp cuts out

My amp is pushing two jbl 8 inch subs and they just stopped working the 3 blue led's will flash and the speakers make a thump at random intervals and the lights in the car will dim at the same time

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  • Anonymous Mar 28, 2014

    i installed a gravity 2100.1 mono block amp and now Im getting this unwanted humming and/or thumping in my subs. is there an easy way to fix this problem

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  • Master
  • 631 Answers

It's likely that the amp has blown output transistors. To eliminate other possible problems, read through the following page:

Amp Going into Protection Mode

Let me know if you have any other questions.

Posted on Sep 17, 2008

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Posted on Jan 02, 2017

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