Question about Kenwood Excelon KAC-X521 Car Audio Amplifier

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My amp is turning on but!!!

The amp is on I have a KAC-X811D Kennwood Amp. None of the fuses are blown but it just stopped playing today, and will not play any sound. It did make a funky smell. Please help me find a solution.

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You probably blew it up. Whenever you smell that smell it is almost always a capacitor in there that blew.

Posted on Jun 19, 2007

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Posted on Jan 02, 2017

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Kenwood kac 628 red light comes on and no audio output


The red light you describe on your amp, is the protection mode warning light. An amp goes into protect for many reasons. Here's a checklist.

1st check the fuse (s) on your amp and make sure they are not blown.

2nd check the inline fuse next to your car battery (if you have an inline fuse)

3rd, disconnect the speaker wires with amp on, does the light go off?

4th check your ground, this may be ok if you have tried another amp with the same wires.

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you may have blown transistors and it is a tricky job to repair and costly.

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could be the board could be just some fuses on the amp and in the power wire sometimes it actually blows the computer on your car but rarely.

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I have used Pioneer before but have not run
across this before.sounds like you may have
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Maybe This Will Help

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FLASHIN RED LIGHT AND SHOWIN E2


1st of all secure your subs/amps good. the tighter they are not only is it safer but your bass will hit harder cuz the box can't move and absorb any of the sound... As far as your amp, check the fuses on the amp. when your ground was disconnected it could have easily fried a protection fuse in the amp. To fix this simply replace the fuse with a new one of the same ampere rating, it shouldn't be hard to find. If all your fuses are good you'll have to see a service professional to fix your amp, or get a new one.

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sounds very similar to something that has happend to mine. if you check the fuses in the amp and they are fine, i recomend replacing the fuse in the power wire. if you are using the glass tube type fuses, sometimes the soldering at the endcaps melts, but the filament doesnt pop. the fuse appears to be fine, but isnt. that happend to me a few times. i had to upgrade to ANL type fuses

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1 Answer

Amp light is on but no power to my subs!


Hi There.

When you say the 40 Amp fuse blew. Was it your mains battery fuse or was it the fuse on the amplifier? If it was the fuse on the amplifier then you may have hurt the amplifier. The Kenwood KAC-8101D is a 1000 Watt monoblock amplifier. Therefore if you say that 1 of your woofers is not playing, then it is almost certainly blown if you are sure it is connected correctly. Try disconnecting it and only running the woofer that tries to play. If this woofer is still working correctly, you will notice a drastic drop if the sound of your bass. The reason for this is because you have changed the impedance load on your amplifier due to the fact that the other woofer is not working. Have your working woofer checked and replace the faulty woofer then you should be banging again.

Hope this helps!!

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