Question about Kenwood KAC-7202 Car Audio Amplifier

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Keep poping the 40 amp fuse on the amps itself when the volume is up at all it seems

When ever i turn up the volume like, maybe to half way, the fuse pops. i have brand new MTX Thunder 5500s and the 7202 an 80 amp inline fuse. but the 40 keeps poping. im annoyed, whats going on?

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Re: Keep poping the 40 amp fuse on the amps itself when...

Your units drawing too much current. it could be a wireing problem, a speaker problem, or the amp has a problem. the correct way to troubleshoot this would first do or have the amp bench tested. Or you can remove all the speakers and wires and turn up the amp. If the fuse still pops,have the amp serviced. Good Luck

Posted on Aug 16, 2006

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Amp power dips when heavy bass drives my speakers, at low volume, the blue light flickers with the beat of the music. i suspect that the amp itself is the fault. tried a different amp.

Suggest connecting with a fuse to a car battery. The current available from a ATX power supply is about 10 amps for the 12 volt circuit(see link).

For a 100 watt per channel amplifier would require a minimum of 17 amps for a RMS (root mean square/average) It is the peak power requirement which is significantly more that can be the problem.

26262737-5ntl554mom5lyewa1raj0eax-1-0.gif For a typical high output stereo the fuse would be 40 amps or more!

26262737-5ntl554mom5lyewa1raj0eax-1-2.jpg Hope this helps?

Aug 19, 2016 | RCA Car Amplifiers


My amp keeps TURNING off and on.

If it just started, you have an equipment or wiring problem. Check the wires first, that's easy. Otherwise, the amp may be bad, check the warranty if its new. Maybe you can get a replacement.

If it's always happened, some cars have an factory amp for the rear factory speakers hidden in the wiring. Sometimes between body panels. If you didn't bypass that, you're more than likely blowing out the new amp with too much power causing it to shut itself down. (protected mode or keep blowing fuses) Could be a blown speaker, bad ground, internal damage, RCA cable problem, the list goes on and on. Find out the preoutput voltage of your headunit and set the gain to what that is and nothing else LEAVE IT THERE, the gain isnt a volume knob for your amp its to get the amp and the radio on the same page (i.e. radios at 50% volume and so is the amp) if you turn it down too low that will make the amp very sensitive to volume adjustments and your amp will be at 100% while the raidos at like 50 or 75% and once you go past the 50 or 75 on the radio the amps going to keep trying to play higher even though its already maxing out which is going to cause it to clip and cause distortion untill it goes into protect mode. Hope this was helpfull to some one

on May 12, 2010 | Car Amplifiers

1 Answer

Zx750.1 kicker amp cutting out

Also check your fuses. there may be a fuse for the in-tank fuse.

Jan 05, 2014 | Kicker (ZX750.1) Car Audio Amplifier

2 Answers

What do you do when your amp keeps blowing fuses

First off which fuse is it? The inline fuse from the battery or the amplifiers power supply fuse? Blowing the main fuse from the battery is caused by either the load (your amp) drawing too much current or you have a short to ground somewhere. Maybe there is a tear in the 12Vdc line and it is shorting to the chassis of your car. If the amps power supply fuse is blowing as soon as it turns on your amp has a shorted power supply. This will require internal component changes by a technician. If it is blowing after operation at high volumes I would say change the impedance that the amp is driving. If you are at 2 ohm try to rewire your speakers for four ohm. (go from parallel to series wiring then bridge mono or operate the amp in stereo mode)

Feb 07, 2010 | Infinity Reference 1300a Car Audio...

2 Answers

Car amp turned off in middle of play

make sure and check all the fuses including the one under hood also check all wires to see if they are well connected

May 13, 2009 | Alpine MRD-M1000 Car Audio Amplifier

2 Answers

Jh202 amp works for a few minutes stops for a few minutes any ideas

Sounds like the amp is going into Protection Mode. Does yours have green LED light then RED LED on it? The green is power and the red is Protection. You will need to either change the OHMS wiring or Put A Fan on it to Keep it Cool Inside.

May 11, 2009 | MTX JackHammer JH202 Car Audio Amplifier

2 Answers

My amp wont turn on

The reason it used to cut-off at 60% volume as you said before,
Is probably due to the "protection circuit mode" being tripped.

You can try resetting it by turning off your CD player ,removing the Batt( + ) and Gnd ( - ) terminals from the amp for a short period. Reconnect them Allow the amp to receive power but not switch on (keep cd player/remote power source off)

If you dont know how to wire the CD player to control the amps power status , the easiest way is to connect the 'power antenna' or similar low voltage throughput wire from the head-unit to the amp's Remote terminal.

My old amp did the same thing ,and would need to be powered off/on before resuming sound output, sometimes I had lots of trouble with the protect mode staying on , even with little or no sound output from headunit.

Jul 14, 2008 | Kenwood KAC-9152D Car Audio Amplifier

1 Answer

AMp keeps blowing fuses

When any amp blows fuses, this indicates that something is drawing too much current. The most common cause are components in the output stage and driver stages that have become defective.

On the amp that is blowing the fuse with the volume being turned up, this means that the output stage is partially working. The short or over-draw of current must be in the output stage, or what is loading it. It is possible in this case that a crossover in a speaker unit is defective, and is drawing too much current. I have seen this with especially sub-woofer crossovers, and the driver itself. Subs pull a lot of current because of the amount of drive power required to have very strong bass sounds. Other than that, this still does not rule out the possibility of the problem being defective components in the amplifier.

Jerry G.

Apr 25, 2008 | Car Amplifiers

1 Answer

Amp problem

you either have a bad ground or your power line is too small, the farther you go from the battery the larger wire you need.

Dec 18, 2007 | Jl Audio 1000/1 Car Audio Amplifier

1 Answer

Sub Shuts off after only being up half volume

try to check your speakers. check the pigtail, maybe it is disconnecting from the cone or from the connector. then after that, resolder it.
if still you h ave the problem we will proccede to the next step. let me know...

Nov 05, 2007 | Alpine MRP-M350 Car Audio Amplifier

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