Question about Kenwood KAC-8103D Car Audio Amplifier

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Amp light turning off and on

I have a rockford fosgate p3 sub with Kenwood KAC-8103D 300watts Mono Amplifier and i have it all hooked up right but when i turn my radio on the light on the amp goes on and off real fast and the sub makes a deep bass sound real fast to but no music out of it how do i fix it

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  • 2 more comments 
  • pritchardgra Dec 25, 2008

    dude yea my amp turns on and off and makes a thud then cuts off kinda like a heart beat its very annoying i need help

  • Anonymous Jan 11, 2009

    Yeah i accidentally touched the positive and negative output wires together and now i get this heartbeat sound. first its fast.. then slowly like if someone is dying.

  • Anonymous Mar 29, 2009

    amp light turning on and off and when i hook up my speakers it makes a deep base sound

  • Anonymous May 06, 2009

    heartbeat thing. i believe it is in safety mode.. is there any way to get it out?

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  • 27 Answers

If you see that happen you might need to your i c sound chip or your trasistor change then and check

Posted on Dec 11, 2008

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1 Answer

I have two 12 rockford fosgates p3 hooked up to and 350.2 kicker amp i just got them so i hooked them up and my amp will keep turning on and off


How may ohms are the p3's and how are they hooked up? Some amps won't handle less than 4 ohms bridged. Try running one sub to each amp channel.
Also check power and ground connections.
Useing too small of wire for power, ground can cause the same problem.

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either the wiring your running is short circuting,or the amp is shot, or the subwoofer is shot, try hooking the same speaker up to the other amp. along with the other speaker to the other amp, see if the same thing happens.

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Hello a_brake11,

The P325.1 is relatively small to power a pair of P3's. You'll only get 325 watts RMS at 2 ohms (162.5 watts per sub). The P3's power range is from 100-500 watts, so they will work, but don't expect them to be really loud.

For best power, your subs should be wired with the voice coils in series and then the 2 subs paralleled to the amp resulting in a 2 ohm load.

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Retry.
If the light stays on, there are internal problems with the amplifier, and it needs to be serviced.
If the amplifier works normally, attach the RCA's and power on again.
If it remains on, connect one sub, and then the other.
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Your amplifier is not rated for a 2 ohm mono load.
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