Question about Kenwood KAC-9102D Car Audio Amplifier

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.

arttyr art Sep 20, 2006

please help me please help me

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Anonymous

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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 300 Watt dual amplifier connected to one 12" kicker dvc sub at 2 ohms. Every time the volume is turned up the protect light turns on. I had 2 of these kickers wired to a Rockford amp a week...

Then you have found your problem. It's internal on the amp. Protection circuitry issue. Have it Benched at a shop with the same impedance you are running it at. If it benches ok, check your ground, it should be no longer than 18" and go directly to the floor frame, not a seat bolt. You should also be running at least
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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

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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.

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Amp protection problem

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Amp protection problem

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