Question about Kenwood KAC-9152D Car Audio Amplifier

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Amplifier not turning on

My am used to play fine but start shorting out on and then of now nothing

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  • seth Alvo
    seth Alvo May 11, 2010

    You really really really have to give more information. There are fuses in the amp and there are fuses in the car going to the amp...what is your level of expertise?

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1 Answer

I have the same problem with a KAC-8151D. Just pulled it apart to do some PCB testing. If I find the problem I'll let you know.

Posted on Jun 20, 2008

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Posted on Jan 02, 2017

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I have an ma audio hk2000d. A couple years ago I hooked it up to a set of subs an it played just fine underpowered then it popped a fuse on the amp. Now every time I Start playing music the fuse pops. I...


Have you tried different speakers? If a speaker has a short, it will draw too much current from the amp and pop the fuse. Also, does the amp pop a fuse on idle, or just under load. What is the gain set for?

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Do you have the radio hooked up to an amplifier? If so, it sounds like you are using the blue wire (antenna remote turn on) instead of the blue/white wire (amplifier remote turn on) to turn the amp on. The antenna remote wire turns off when leaving tuner mode.

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My subwoofers will only play at extremely low volume


Most of the time it's 2 things, first thing is a section on the PCB has burned out and this leave you with very little power going to your speaker, This is common by using incorrect wiring or peaking the amp all the time, You can start by pulling the PCB out and looking for any physical damage, If there is some you can solder a connection with copper wire. The second thing is blowing your finals, This happens when one side of the bridge for the PNP NPN transistor section blows out usually on the on position and this can send a dead short to your other final transistor. they will be in pairs of usually starting with A,B,C,D and a number grouping. This is next to impossible to fix.

Apr 05, 2010 | Kenwood 1000W Class D Bridgeable Mono...

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I have a dual XIA3145 580 watt amp that keeps blowing fuses


Generally, this indicates that there's at least one shorted output transistor.

Disconnect all speaker wires from the 'amplifier's speaker terminals' and disconnect RCA/signal cables from the amp. If it powers up normally, the speakers/wiring need to be checked. If it still blows the fuses, the amp almost certainly has shorted output transistors and will need to be repaired.

I'd recommend using two 10 amp fuses. The amp will power up with 10 amp fuses if there is no problem. If there is a problem, there's less of a chance of doing more damage by using the 10 amp fuses.

Let me know if you have any other questions.

babin_perry@yahoo.com

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Problem


Start removing wires from the amp, one by one (except for the +12V, Ground, and remote) until the amp seems to work fine. Usually, this type of issue is due to a speaker wire shorting to something it shouldn't be touching. Check the "non-amp" end of all the wiring to make sure they are solid and correct.

Apr 04, 2008 | Volfenhag ZX-8300 Car Audio Amplifier

1 Answer

Amp has power and sound at very low settings only


It sounds like you may have a speaker wire shorted to ground. This could trigger the protection circuit. Check all wiring including the area behind the 6x9s to make sure that nothing is shorted to metal/ground. If you can't see any shorts to ground, use an ohm meter to check the wires.

Disconnect the wires from the amp and measure the resistance between the speaker wires and chassis ground. Ideally, they should show infinite resistance. If you read anything other than infinite resistance, trace all wiring to find the short.

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