Question about Kenwood KAC-9102D Car Audio Amplifier

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Amp protection problem

I think I've done every thing, I've change the wiring from 8ga to 4ga, I put a cap on the line to stablize the power supply but the amp will still shut down after a while. I'm running one mtx 7500 12" at 4ohms the recommend power is 400 watts, with this amp I'm pushing 500 watts to it would that cause a short in the speaker? the amp is not that warm when it goes into protection.

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  • arttyr art Sep 20, 2006

    please help me



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I run one sub on my Kenwood Amp also. It does over heat also. My conclusion is that we are both trying to push that one sub too hard and the amp is having to work really hard to make that sub do what we are asking. Also, not having enough power or a good ground will cause it to over heat. I am going to go with the voice coils are heating up though.

Posted on Dec 06, 2006


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I have a 900 watt amp wired to 2 mtx 12's. it powers up fine but when the bass hits the power light fades away

Try using a 4ga ground cable. Ground it to the frame of your car. And use a 2ga and a inline fuse 100amp run this to your battery. And you need a cap. A 1000 watt will work good. Hope this helps....

Feb 08, 2014 | Alpine MRP-M450 Car Audio Amplifier

1 Answer

Can i hook this amp to a 2 channle out put stereo?

Sure. Specs are listed below. I think it's designed for regular 2-channel input, isn't it?


Front Channels: 100 W RMS x 2 @ 1.5 ohm-4 ohm (11V-14.5V)
  • Rear Channels: 25 W RMS x 2 @ 1.5 ohm-4 ohm(11V-14.5V)
  • Subwoofer Channel: 250 W RMS @ 1.5 ohm-4 ohm (11V-14.5V)
  • THD at Rated Power: <0.03% @ 4 ohm (F&R), <0.05% @ 4 ohm (Sub)
  • S/N Ratio (F&R): >108.5 dB below rated power S/N Ratio (Sub): >95 dB below rated power
  • Frequency Response (front and rear): 5 Hz-30 KHz (+0, -1dB)
  • Frequency Response (sub channel): 5 Hz-500 Hz (+0, -1dB)
  • Damping Factor (front and rear): >200 @ 4 ohm/50 Hz
  • Damping Factor (sub channel): >500 @ 4 ohm/50 Hz
  • Input Range: switchable from 200mV-2V RMS to 800mV-8V RMS
  • Differential-Balanced Input Topology: (3 pairs of inputs)
  • Front Crossover: fully-variable (50 Hz-5 KHz), selectable- slope BP or HP (12 or 24 dB per octave)
  • Rear Crossover: fully-variable (50 Hz-5 KHz), selectable- slope HP (12 or 24 dB per octave)
  • Sub Crossover: fully-variable (40-200 Hz), selectable-slope LP (12 or 24 dB per octave)
  • Preamp Output: 2-channel (full-range or LP)
  • Bass EQ: Variable boost up to 15db
  • Infrasonic Filter: defeatable 24dB/octave at 30 Hz
  • Left minus Right Ambience Circuit: ambient effect for rear channels
  • Front and rear speaker output connections: accept up to 8ga. wire
  • Dual mono subwoofer output connections: accept up to 8ga. wire
  • +12V and Ground connections: accept up to 4ga. Wire
  • Dimensions: 19.7"L x 9.25"W x 2.36"H
  • Dec 02, 2010 | Jl Audio 500/5 Car Audio Amplifier

    1 Answer

    I am purchasing a kicker solo x 12inch and installing it into a crown vic. can i hook it up like a regular sub power from batt to cap and amp or do i need to have an extra power source like another battery...

    4Ga wire should be plenty for your application.
    If you're concerned - run (2) lengths of 4Ga - its cheaper than 0.
    A battery only extends the playing time of your system with the vehicle off.
    Your car runs off alternator power - and it is recommended you upgrade the alternator to a High capacity one to properly supply voltage to your amplifier.
    A capacitor is a cheap bandaid that will prolong the life of your stock alternator - but eventually - the alternator will die from the lage demands placed on it.
    Put the battery and cap money toward a High Output alternator.

    Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.

    Nov 22, 2009 | Kicker 12" Solo X Subwoofer S12X - 5000...

    1 Answer

    I dont Know what guage of wires to use with my Amp

    8ga will be fine with the amp listed, but if you plan on upgrading in the future, then go ahead, and buy the bigger wire. 4ga +. See at the time of purchase there is only about $20 difference between 8ga, and 4ga kits, but if you go with the smaller wire for now, and then upgrade later on, you end up paying double for yopur wire, and double for your install (if you arent doing it yourself).

    Aug 07, 2009 | Pioneer GM-X332 Car Audio Amplifier

    1 Answer


    go with an 8GA wire and see what that does for you because the battery is sending power to an amp but the amp cannot transfer all of that power anywhere without speakers being ran to it if you think 8GA is to small then try running a fuse in with your 4GA

    Jun 23, 2009 | Visonik V117SX Car Audio Amplifier

    1 Answer

    Kenwood KVT-847DVD radom reset problem

    I solved this by changing where the power for the DSP unit was coming from the manual specifys to connect them to the same +12 connector for display and DSP and it worked fine in the Series 1 however for some reason in the series 2 the DSP unit draws too much power from the headunit +12 power connector and as soon as the unit fires bass in a song etc it drags it down to the point of the display shutting off, I change the +12 on the DSP unit to my 4GA +12 power cable through an adaptor block and it has worked fine since.

    Apr 17, 2009 | Car Audio & Video

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    POssibly Blown amp? Please help

    disconnect all power cables.make a short between terminals G&P G&R then try amp without any speakers connected.

    Jan 06, 2007 | Infinity Reference 7541a Car Audio...

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    Fuse keeps blowing when sub volume is turned up

    the amp draw rating on the amp is 100 you need to put a larger fuse in, such as a 150 amp, it would be a good idea to go to 0 ga but not needed. you might also want to upgrade your altenator.

    Nov 29, 2006 | Jl Audio 1000/1 Car Audio Amplifier

    2 Answers

    Audiobahn A1500HCT in Protection Mode

    try just hooking up a power wire and ground wire only. disconnect your subs from your amp along with the remote wire and RCA's. if you have some jumper wires or run a wire from the power terminal to the remote wire. YOUR amp should come on, if it still stay's in protection mode it might be shot... hope this was helpful, i couldn get my a2300hcx to come on and tryed this and it came on turns out it was my remote wire was bad of the head unit...

    Nov 13, 2006 | AudioBahn A1500HCT Car Audio Amplifier

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