Koiiler XM-8787C Car Audio Amplifier Logo

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Posted on Oct 21, 2009
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I have a Koiiler xm-8787 and it has power going to the amp and the remote lead is powered but I have lost the output to the speakers. I am guessing the amp is done. It was working fine a feqw weeks ago then it started cutting in and out now it is just out.

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  • etsxffg Oct 25, 2009

    The ground was nice and tight. HAd all kinds of power going to the amp just no output to the speakers.

  • etsxffg Oct 25, 2009

    I had proper voltage that is why I sent out this request for other Ideas. the led is lit and the remote lead has power to it also.

  • Anonymous May 11, 2010

    It probably has an intermittent connection if it was going in and out. Do the following to confirm that you have sufficient B+ and remote voltage as well as a good ground. With your multimeter set to DC volts, the black meter probe on the ground terminal of the amp (not on the point where the ground wire connected to the vehicle) and the head unit on (so the amp will have remote voltage applied), touch the red probe alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low. If both the B+ and remote turn-on lines are low and your battery is fully charged, you may have a bad ground connection. If that's OK. Does the power or protection LED light up?

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  • Posted on Oct 24, 2009
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Sounds like it could be your earth i hope so please check its nice and tight

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  • Posted on Jul 28, 2012
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I have a koiiler8787 its all turned on but wen i connect the subs it pushes them out but no sound so i switched the amp and it was fine on a different amp

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  • Posted on Nov 08, 2011
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What kind of fuse are you using for your amp ?

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