Question about Car Amplifiers

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Amp i set in my car on break and it worked fine i get in a couple hours laterr to go home and my subs and amp still work there just no where near as loud what would cause this ?

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Re: amp - Car Amplifiers

See if your deck is muted.

Posted on Jan 20, 2008

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JL Amp isn't powering subs and speakers

silly as it sounds, you may want to check your EQ settings on your headunit. Things like sub volume, SLA, loudness and balance. When they replaced your battery, those old settings were lost.

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Amp burned out but fuses still good?

this is caused by inproper wiring from the speakers/subs to the amplifier.. an amp will still put out power to subs and speakers when it's wired improperly but it won't last for very long doing it... 6 months is longer than usual....

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My subs don't bump to the beat, they just go THUMP THUMP THUMP...

It sounds like you need to ask for pro help mate, mybe the amp just needs setting properly, Is the amp on bypass for bass, or does the amp run the complete system

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Remote bass control short

It Could be Eiher Problem Make Sure The Remote our using is thew same brand as the amp its plugged in to

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Kenwood KAC-8401 light goes from blue to red when turned on

Either the amp is ad or the sub got shorted? You can check itby disconnecting the Sub and seeing if the amp comes on blue then. If yes, then the sub is shorted. If no, then the amp is shorted. Also chck the voltage AT THE AMP. Make sure that it is above 12 Volts.

Larry T
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Dec 29, 2008 | Kenwood KAC-9152D Car Audio Amplifier

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have you checked the levels on the ohms? adjust them higher if need be contact me on yahoo msgr if you need more assistance

jcbproducts-always forward


Nov 14, 2008 | American Pro VS-2043 Car Audio Amplifier

2 Answers

Amp staying on but cutting out?

Hello Willb2396,

Actually you answered your own question in your paragraph. I draw your attention to your statement of:
"It will work for as long as I'm driving I will park my car, and when I turn it back on every thing will be working just fine and, then a couple minutes later, amp cuts out and won't hit for a couple hours or a couple days.... I have checked the sub multiple times and I don't see it being the sub or the amp"

You are correct it is neither the Sub nor the Amp. The problem is either your voltage regulator or your alternator. one and or the other is going bad.

Here is some advice check your ground wires, the buy a dual alternator kit, it contains the parts you will need to add an additional alternator to your car. This will provide the power you need.

I hope this helps,

Thank you,


Nov 10, 2008 | Alpine MRP-M650 Car Audio Amplifier

3 Answers

Kicker 750.1 Amp wont play music

it is probably the rca inputs on the amp may have fried. was your cd decked turned up loudly before the power went out? did any wires accidently touch each other? If had worked fine and then suddenly stopped, than either a wire came loose or the inputs fried. try using different cables and I also suggest disconnecting power for 24 hours and then reconnect. If the green light is on then it is getting power and the problem is in the rca cables or the inputs

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1 Answer

Cant figure out my car audio problems!!!!!

There are a couple of tests you can perform. I'd first recommend checking the shield ground. You'll need an ohm meter. The details can be found on the following page.

RCA shield ground test

You can also test the output with the multimeter. Set the multimeter to AC volts. If it's not an auto-ranging meter, set it to a voltage range of ~2v AC. Disconnect the RCA cables from the head unit. Touch one meter probe to the outer ring of the head unit's RCA jack. Touch the other probe to the metal contact in the center of the RCA jack. With the head unit near full volume and a clean signal source, you should read at least one volt on musical peaks. If you have a bass disc or a test tone disc (~60hz sine wave), use those.

May 04, 2008 | MTX Thunder 8302 Car Audio Amplifier

1 Answer

Cant get the red led light green again

Disconnect all input and output cables and check. If the light stays red, it suggests an internal error. If not, proceed by first connecting the Sub wires and checking, then the input RCA's and checking. Remember to switch off the system before connecting/disconnecting, I suggest also removing fuses during this process.

Mar 11, 2007 | Pioneer GM-232 Car Audio Amplifier

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