Question about Kenwood KAC-9152D Car Audio Amplifier

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Won't turn on

Information: -2x Rockford Fosgate HX2's in 4ohm load wiring -Kenwood KAC-9152D Amp -4ga. Power/Ground -16ga. remote Problem: Alright, this amp WAS working for a good while on my old setup, which the only difference was a box. At some point, one of the wires on the sub's coils came loose (due to someone not putting it in the clip properly), and it started making a fuzzy noise, but still worked ok. Up until one day, my amp just wouldn't turn on. Eventually, the box just fell apart (shoddy construction, this was a second hand box), so I pulled the system out, pulled the power fuse from the wire, and just had the components floating around in my room. Eventually, I got a new box, rewired everything, and hooked it all back up into my car, only to finally remember that my amp will not turn on. I pulled out my trusty DVOM and my power probe. Full battery voltage in, ground is good, and the remote wire is also sending 12.6v in. So everything is in order. I checked the amp fuses again, JUST in case. All good there. I've opened up this amp before just to do a trace check when it first went. All the traces are good, no burns on the components. What in the world could be the issue?

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Re: Won't turn on

The output devices (IC's), and their respective drivers are damaged. It is very likley that some of their support components may also be damaged.

When there are intermittants and or shorts on the output of these amplifiers, they are very easily damaged.

The amp will require proper shop service done by an experienced tech.

Jerry G.

Posted on May 01, 2008

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Larry T
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Usually, protection mode is caused by one of these conditions:
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  • There is an internal issue, causing DC voltage to be present on the speaker outputs.
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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.

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when your amp cuts out,is it when your stereo is produceing a long low note.if it is then the problem lies within the power distribution from the your sub pulles a long low note it draws a lot of power and sometimes the battery cant supply the power fast enough and the amp cuts out. useing a power cap is one way to solve the problem,but the best option for you to use becouse your running high powered amps is to have a sepparate battery for your audio using a split charging system.when your car battery is fully charged a relay swiches the power so that it charges the audio battery,so your auio system will have constant power without putting stress on your car battery. you can get thes from all good audio shops. hope this helps you.

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use a multimeter to check for power on the +ve wire, could be your fuse, it only rus a sec when you jumper the remote to +ve because the remote cannot give out the nessary current to run the amp.

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