Question about Kenwood KAC-7202 Car Audio Amplifier

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Kenwood KAC 7502 Amp trouble

Hey, I would like to know if the light on this amp is supposed to be red? My friend said he had this same amp and when he first got it the light was red and was not working properly so he took it back and got another one and this time the light was blue and the amp worked properly. I bought the working amp off of my friend but I dont remember the color of the light on the amp. I ended up blowing that amp and I am now in the process of replacing it. I ordered this amp again off a legit website and when I got it and installed it the lights were red and the subs would kick off and on. Sometimes the The amp also had a funny smell to it like it was burning. If the lights are supposed to be red, can anybody to me what my problem may be so I wont have to go through all the trouble of shipping and exchanging the amp?

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Re: Kenwood KAC 7502 Amp trouble

Exchange the amp it is going into Protect. But your sub may be causing this problem if it is shorted. Make sure your subs are wired to at least a 4 ohms. Only a shop can tell you for certain if your sub is shorted or not. But if you are smelling smoke then that amp is already toast.

Posted on Jun 29, 2007

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SOURCE: kenwood kac-7202 amp

150/ch into 4 ohms
230/ch into 2 ohms

Spec Sheet

Posted on Jan 11, 2008

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SOURCE: want to bridge my subs I have a kenwood kac-719

from what i have read about your amp, it is already a mono amp, and rated for 2 ohm's, so all you have to do is wire the subs in parallel (both positives together to positive and both negatives together to negative) or series/parallel if you have dual voice coils (both positive and both negative paired on each sub, then positive from amp to positive on one sub; negative on that sub to positive on next sub; then negative on sub to negative on amp) Note though, with two dual voice coil subs, you can have a 1 ohm load with the first set up, which can damage your amp. Let me know if this helps :)

Posted on Jun 11, 2009

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SOURCE: just woundering if i could bridge one sub to front

Hello bigmac208,

Yes, that would be the best connection for both the subs and the amp.

I'd wire the sub voice coils in series since the amp will not be stable at 2 ohms when the channels are bridged. The power will be somewhere between 100-200 watts RMS to each sub. While it's not pavement pounding, it should provide pretty good bass, especially if you tweak the crossover and boost settings for best bass response.

Hope this helps.

Posted on Aug 28, 2009

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SOURCE: have kenwood kac 7204 2

Hi you run them in sterio two 4 ohm subs sterio two 8 ohm subs you can run mono or four 4ohm subs can be run in mono also

Posted on Feb 05, 2010

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Kenwood kac 628 red light comes on and no audio output

The red light you describe on your amp, is the protection mode warning light. An amp goes into protect for many reasons. Here's a checklist.

1st check the fuse (s) on your amp and make sure they are not blown.

2nd check the inline fuse next to your car battery (if you have an inline fuse)

3rd, disconnect the speaker wires with amp on, does the light go off?

4th check your ground, this may be ok if you have tried another amp with the same wires.

5th.if none of these turns the protect mode off, it may be an internal fault.

you may have blown transistors and it is a tricky job to repair and costly.

Jan 28, 2013 | Kenwood KAC-628 Car Audio Amplifier

1 Answer

My kenwood kac-5204 amp lights up red but no sound???

when the amp lights up red that means proteion , an no sound mean input is gone on the amp . you have to take it apart an fix it

Jul 19, 2011 | Kenwood Car Amplifiers

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

Feb 21, 2010 | Kenwood KAC-9102D Car Audio Amplifier

2 Answers

My subs/amp are not working

when you car is running, it charges the battery somewhat. So the voltage problem is not a problem. The red light means the amp is going into ''Protect Mode". This usually happens when something is wrong with the amp. Usually the amp is getting hot. Check all of you connectiong and check the final impedance of the subs. Make sure the amp can handle the impedance of the subs. If you need anymore help, message me.

Feb 12, 2010 | Kenwood Excelon KAC-X621 Car Audio...

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Red Light

that means you probably have a shorted speaker wire, a bad speaker or the amp itself is bad, try disconnecting the speakers one at a time and see if it turns on or not. if the red light stays on with no speakers hooked up it means the amp is bad

May 30, 2009 | Kenwood KAC-7252 Car Audio Amplifier

1 Answer

I need help

Most of the time if the red light is on the amp is no blown but some times it does this cause the subs are hooked up in the wrong way. If the amp is only 2ohm stable and you hook the subs up to it at 1 ohm than the amp will not work so I would check this frist.

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

1 Answer

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.

Jul 14, 2008 | Kenwood KAC-7202 Car Audio Amplifier

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