Question about Kenwood KAC-9152D Car Audio Amplifier

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Kenwood kac 9152D

I JUST BOUGHT A KENWOOD KAC 9152D. I CANT FIGURE OUT WHY IT KICKED ON PROTECTION..

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Your problem is that the transistors on the circuit board are shorting out on the back panel of the case. is the amp connected to the sub box? its caused by the vibrations through the box and amp when the bass hits really hard. remove the bottom cover off the amp, and look for some scorch marks, if there is any, find the leads on the circuit board that are causing it and bend them down a bit. i had the same problem with my amp, and so have many other people. this fixed my Kenwood 9152D, and it has worked fine for many years after using this solution. if anyone has this problem and needs help with fixing it, email me at thadoggma420@hotmail.com

Sam

Posted on Feb 13, 2009

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If you are using 4 Gauge Wire on Power and Ground. Try 2 Gauge instead.

Posted on Apr 03, 2008

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Usually, protection mode is caused by one of these conditions:

  • Shorted speaker outputs.
  • Speaker output shorted to ground.
  • There is an internal issue, causing DC voltage to be present on the speaker outputs.
  • Amp overheats.
  • Ground connection is insufficient for amp or HU.
I'm not sure of the history or symptoms of your amp, but those are the reasons why the amp could go into protection mode.

Posted on Mar 13, 2008

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1 Answer

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I have the Kenwood KAC-9152D Repair Owners Manual. This is my E-Mail address. canalv11@gmail.com send my a e-mail. & I will e-mail back 2 U w/the Manual ATTACHED

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My 1800 watt kenwood keeps goin into protect mode as soon as i turn it on.. why?


disconnect load (speakers), check if it still goes in to protection if so then your output stage might be faulty

Apr 17, 2010 | Kenwood KAC-9152D Car Audio Amplifier

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My amp is a kenwood kac-9152d it goes in to protection mode soon as you hook up the power


In protection mode do you mean the light comes on and it plays music and stuff? If that's the case, that's what the amp is supposed to do. Protect itself from a power surge

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I have a kenwood kac-9152d running a 10 inch rockford fosgate power t1 and the amp keeps going into protect but i have a smaller kenwood kac-8102d running on another t1 and i have no issues with it why...


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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My problem turned out to be that the RCA inputs were so sensitive, they picked up interference from my head unit through the RCAs.
I replaced the head unit with a newer model, and had no problems after.

This may not be your case, but hope it helps.

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How long will the bass play before the amp kicks into protection mode and how loud are you listening to it? I've noticed with my amps that if they don't have enough air flow they will get hot and kick into protection mode. They will also kick into protection mode if you are running it at more than it can handle. Check your adjustments on both your amp and the head unit. Make sure you are not running more bass than the amp can handle.

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There could be several problems. The following page should help you determine if you have a problem with the amp or something connected to the amp.

Amplifier in Protection Mode - Troubleshooting

Let me know if you have any other questions.

Sep 17, 2008 | Kenwood KAC-9152D Car Audio Amplifier

1 Answer

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you need to check your wiring and check your rca wires to see if they are giving your amp a signal to put out

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by jump do you mean all it does is thump and no sound besides thumping noise? if so put a better ground on your amp, double grounds work the best. please reply

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