Question about Kenwood KAC-9152D Car Audio Amplifier

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Kenwood amp kac-x401m

When playing music the bass play then goes out and my amp protection light comes on.but when i shut my truck off and turn it back on the amp works again then will turn off or it will stay on

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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.

Posted on Nov 28, 2008

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Solve Your ''kenwood kac x40m problems'' Problem Now! the operation protection light is on never goes off subs dont work what do i do


your amp output transistors are shorted and protection is activated to protect your amp from bigger damage.if you are confident you can try to open the amp and you should see some burn marks or burnt(blown) transistor and just simply replace him.or take it to repair shop

Mar 21, 2010 | Kenwood KAC-X401M Car Audio Amplifier

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I have a 1800 watt amp but the red light is on but it dose sound like the bass works but not it its prime


the red light is for power in protect mode it should be orange and it will not emmit sound if you think you should have better sounding bass or more bass you can try to play with the gains on the amp or possibly if you have the negative or positive hooked up wrong from a speaker to the amp this will cause the bass to be lower and somewhat distorted double check your positive and negative wires from the speaker to the amp and make sure they are correct

Feb 28, 2010 | Kenwood KAC-9152D Car Audio Amplifier

1 Answer

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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Poor sound/ Unable to play anything load without distortion.


i can tell you right now base on the vehicle you have a bad system hook wosrt if you are using factory head unit

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Repeated blown subs


Unfortunately some of these speakers today... DO NOT PERFORM up to peak as they should.The on logical reason for this to be happening it that the speakers are NOT very DURABLE and cannot take constant playing. I would recommend to L7 the can take alot more abuse than your average speakers. Good luck and thanks for using FIX YA

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1 Answer

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

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Kenwood kac-7202


Nope it's not a high-to-low level converter problem, it's most likely a problem with one of two things. 1) either you've blown the output stage in the amplifier, or 2) you've hooked up your subs wrong and your amp is seeing to low of an impedance. The amp is supposed to be 1ohm stable, but we had the same problem. When the indicator light goes red it means that the amp has gone into protection mode, now you have to figure out why. If something in the amp goes bad or just disconnects from the board it will cause power protection mode. If you fry something on the board because you are running the amp to hard or at the wrong impedance it will go into thermal protection mode, however there's no simple way to figure out which has happened.

Have you tried hooking up some different subs to see if the problem remains? try this. If the problem no longer happens then you know it's your subs, if it does still happen then you'll know it's an internal problem.

Years ago I had a Kenwood KAC-821; long story short, I melted the main power wire right off of the board, everytime I turned the system up the amp would shut down.

Take you amp to an authorized dealer and have them bench test it for you.

Let me know what you find out.

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Cooling fan light on My KAC-X401M


disconnect all power including ground for 20min

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