Question about Kenwood KAC-7202 Car Audio Amplifier

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Keep poping the 40 amp fuse on the amps itself when the volume is up at all it seems

When ever i turn up the volume like, maybe to half way, the fuse pops. i have brand new MTX Thunder 5500s and the 7202 an 80 amp inline fuse. but the 40 keeps poping. im annoyed, whats going on?

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  • Robert Whiteley Aug 16, 2006

    Alright, another thing. it does it when the bass hits though. too deep of bass, too loud, and it pops. it seems like the amp is trying TOO hard. i dont get it. i plan on taking the amp to mikey shorr today and have it tested, maybe they can tell me somthing. Thanks

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Your units drawing too much current. it could be a wireing problem, a speaker problem, or the amp has a problem. the correct way to troubleshoot this would first do or have the amp bench tested. Or you can remove all the speakers and wires and turn up the amp. If the fuse still pops,have the amp serviced. Good Luck

Posted on Aug 16, 2006

  • Larry  Dillon
    Larry Dillon Aug 16, 2006

    Yes Sir thats always the best test ,out of the vehicle. This way they can see if its pumping enough without excessive current draw. If it happens in the car then you know its an installation issue or the speakers or wires are shorting or bad.

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If it's always happened, some cars have an factory amp for the rear factory speakers hidden in the wiring. Sometimes between body panels. If you didn't bypass that, you're more than likely blowing out the new amp with too much power causing it to shut itself down. (protected mode or keep blowing fuses) Could be a blown speaker, bad ground, internal damage, RCA cable problem, the list goes on and on. Find out the preoutput voltage of your headunit and set the gain to what that is and nothing else LEAVE IT THERE, the gain isnt a volume knob for your amp its to get the amp and the radio on the same page (i.e. radios at 50% volume and so is the amp) if you turn it down too low that will make the amp very sensitive to volume adjustments and your amp will be at 100% while the raidos at like 50 or 75% and once you go past the 50 or 75 on the radio the amps going to keep trying to play higher even though its already maxing out which is going to cause it to clip and cause distortion untill it goes into protect mode. Hope this was helpfull to some one

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1 Answer

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It will help if you can identify the 40 Amp fuse that is being toasted when the key is turned.

I looked briefly at a fusebox diagram and found 3 circuits protected by a 40 Amp fuse. The Lamp circuit protects several circuits which have smaller rated fuses on each separate wire. The 40 Amp protection seems to be a safeguard if all the smaller circuits are active in total. Turning off the automatic headlights, should reduce power drain.

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Have them check the fuel pressure. The Inertia switch could have tripped while the car was being repaired. It does not explain the wiring short, but can explain the no start condition.

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1 Answer

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1 Answer

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