Question about Kenwood KAC-8104D Car Audio Amplifier

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Amp turns off after about 5-10 minutes of use for a few seconds

My amp is brand new i hooked it up right and it makes my speakers pound. But the amp shuts off after only a mere 10 minutes of use for a few seconds then turns back on and works for a few more minutes then turns off again.

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One of two things...Amp is going into overload protection (should be indicated by a light on the amp), or you have insufficient power going to the amp....if this is the problem, try a 2 farad capacitor on the input power line to the amp.

Posted on Mar 12, 2009

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1 Answer

Why does my amp keep cutting off after a few minutes


Either amp overheating

Speakers wire are dropping below 2 ohms

Too small of wire feeding amp


Make sure amp has plenty of open space

Make sure wire feeding amp is sufficient for the wattage

Are you running the amp bridged or do you have multiple speakers hooked.

If you got anymore information I can answer a little better.

Sep 02, 2013 | Volfenhag Car Audio & Video

1 Answer

Brand new pioneer 820 watt amp worked for about ten minutes, now the speaker output light flashes on and off


You didn,t have the sub wire up properly, End fried the output transisters in the amp. Or it was not set (Properly)

Nov 05, 2012 | Pioneer Car Audio & Video

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I have two brand new mofo 122x in a custom box made right to thier specs its powered by the nxd4500 and it plays loud for a few minutes then it only plays at half or at least thats what it sounds like so...


make sure your amp can hold either .5 ohms , 2 ohms or 8 ohms...... by my guess your amp is either 2 ohm stable or 4 ohm stable and you have them wired down to .5 ohm.....this will cause it to overheat and kill your amp. check out the12volt.com it will give you wiring guides for hooking up subs.

Mar 30, 2011 | Boss Nxd45001 Car Amp

1 Answer

I have a brand new soundstream xxx 6500d amplifier and when i installed it for the first time protect mode light come on even without rca jacks and speaker wires hooked up. any1 can help?


You need to plug in the RCA and speakers you could blow the amp. The amp is sensing no Input and No output. I would unplug the amp wait around 30 seconds then install the rca and speakers THEN install amp to battery + cable. You should be ok.

Jan 24, 2010 | Soundstream Xxx-6500d Power Amplifier Xxx...

1 Answer

Amp worked then went on protection..


Make sure your speakers ohm levels are compatible with the amplifier. The amp is shutting itself off to protect from damage. Your amp may be setup to work with 8 ohm speakers and if you are using a 2 ohm sub-woofer it will stress out the amplifier. Some factory speakers are rated at 3 or 2 ohms. And if you have more than one speaker hooked up per channel that can stress out the amplifier. Also make sure all the speakers you are using are rated at the same ohms. Make sure all the speakers are wired the right way...+ to + and - to -. If some speakers are not wired with the positive speaker wires to the positive connection on the speaker and negative the same this can cause problems with the amp. Also make sure your power wire to the amp is large enough gauge for the amplifiers power requirements. Otherwise the amplifier might have an internal short or just cannot output the wattage needed for your system.

Sep 21, 2009 | Car Audio & Video

1 Answer

Amp runs but then will just turn off and red light comes on


you may have fried the amp pre outs in the head deck, try the amps on another stereo

Jun 01, 2009 | Lightning Audio Bolt B2.150.2 Car Audio...

2 Answers

Profile mono 1000watt amp


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Dec 13, 2008 | Profile 600MSX Car Audio Amplifier

1 Answer

Sony xm1652z amp problems


it sounds like you have the high lvl inputs on the amp hooked up instead of the rca's. this will cause the boominess for a few seconds when the amp is on and right when you turn it off

Jul 11, 2008 | Sony Xplod XM-1652Z Car Audio Amplifier

1 Answer

Car audio amp or speakers bad?


If you know how to use a multimeter, you can test the amp this way:

-unhook the subs
-hook up a cheapie speaker you know for sure works to one of the channels
-unhook the audio inputs
-turn the amp on
-set your meter to VDC
-put the positive probe on the inside of the input connector, being sure you make contact with th inner contact
-take the negative probe and tap it on the outside of the connector

What you are doing is sending a low voltage (replicating an audio signal) into the amp audio circuit and allowing the amp to amplify it. If the amp makes the speaker pop each time you strike the probe, the amp is working.

There is an inherent problem with band passes. The naturally filter out high frequencies like a crossover, including distortion, so it makes it hard to hear when the subs begin to protest.

Nov 22, 2007 | Dual XAF-460 Car Audio Amplifier

1 Answer

Sony XM-DS1300 amp


If they have bridged the outputs of the amp, be sure that the "ohms" load is 8 ohms. This would then apply a 4 ohm load to each of the output channels. It sounds like they have bridged the output or else hooked up the speakers in a paralled configuration that is trying to kill your amp. If you are using dual voice coil speakers then you have to treat each of the voice coils as a seperate 4 ohm speaker and wire accordingly. You need to correct this NOW or else you will fry your amp. Good luck.

Mar 03, 2007 | Sony XM-DS1300P5 Car Audio Amplifier

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