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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Re: amp protection problem

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

Audiopipe amp 1000w on 2 8" double ended bazooka

You may be over driving the speakers or there may be an impedance mismatch between the amplifier and speakers, especially if they are connected in parallel

Nov 12, 2012 | Car Amplifiers

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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

    My amp protection will not turn off i tryed almost everything?

    i wish i can chat to you live so i can ask you qestions about your amp but to figure out what section of the amp might be fried it could be the power supply section could be the out put section or the in put section but i would try process of elimulation try unplugging your rca jacks and your subs unhook to your amp just the power hook up and try powering it but if the protection light steel comes on then try to remeber the last time your amp was working good and playing your subs was your amp getting hot if so you probaly fried your out put chips and not telling what else next question was you just hooking your amp up in your car and acually touch one of the power wire to the ground on your amp this happen to my friend and fried the power circuit relay chip on the power supply thats all the advice i can give but usually when the protection light comes on and you got every thing hook up right something fried

    Oct 29, 2009 | Power Acoustik LT-980/2 Car Audio...

    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

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    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

    Protect mode on 475a

    Yes if your wires are to small they dont supply enough power to the amp and it will shut down..Also the ground..Check all connections for tightness and that none of the wires are touching or grounding out...Hope this helps you and have a great day

    Apr 02, 2009 | Infinity 475A Car Audio Amplifier

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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...

    4 Answers

    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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