Question about Alpine MRP-F250 Car Audio Amplifier

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Getting shocked by my truck

Everytime I turn off my truck I get shocked when I touch metal, even through my clothes, as I slide out. Does anyone know the problem?? Also, I'm only running a 600W Pioneer bridged to channels 3 and 4...is this o.k.?

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Yes it is..Its only static electricity.. But be careful if you are getting gas.. Do not start pumping gas and then get back in to your truck while pumping and then get back out and grab nozzle WITHOUT touching metal first.. Even a little static can ignite the fumes..Rule #1.. Ground yourself before touching the gas nozzle..

Posted on Nov 11, 2008

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No power 2 amp


3 things I find common and 1 that\'s uncommon: 1st off, do you have a 24v signal going to the stereo?
Can you show me where you grounded? If you did it on say a strut/shock bolt, when the shock is compressed, the ground bolted to it would become ungrounded. This would normally be the case if it would come on, then turn off when u sit inside or it a bump. Of course, it could be you did not sand the area. I assume there is paint even inside the trunk were it\'s most likely grounded. If u just bolt it down, it WILL NOT work. You have to have a clean metal surface.

Jun 17, 2013 | Car Amplifiers

1 Answer

When i turn amp on it outomaticly goes to protective mode why is this or what could cause this?


It's doing that cause it's trying to protect its self. There is either something shorting out or blown inside or the power/ground/remote wires could be shorting out going to it. Make sure that the power/ground/remote wires aren't touching any metal and that there are no breaks in the insulation. If it's not that and you're getting 12v on the power and know you have a good ground something has probably gone bad on the board. This can be caused by a multitude of reasons from faulty components to heat to trying to push to much power out of it.

Mar 01, 2011 | SPL FX12000D Car Amp

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AMP HAS PROBLEM.. SOUNDS AS THOUGH THE LINE INPUT AMPS HAVE PROBLEMS IN AMP ALSO ONE THING TO CHECK WOULD BE TO DISCONNECT SPEAKERS AND HOOK UP RCA'S.. CHECK THE SPEAKER OUT PUTS WITH A DC VOLT METER TO SEE IF YOU HAVE DC VOLTAGE ON THEM IF SO YOU HAVE SOME SHORTED OUTPUTS

Apr 24, 2010 | Kicker ZR600 Car Audio Amplifier

1 Answer

I am getting power but there is no sound from the subs. Wiring harness is correct but when you touch the amp with a screw driver or anything metal it sparks.


Okay well it sounds like you need to rewire the wires going from your amp to your sub-woofers.

Don't touch the amp while it's on with a screw driver!!

Jan 14, 2010 | Volfenhag ZX-7180 Car Audio Amplifier

1 Answer

Koiiler XM8787 Amp power problem


Sometimes i goes into protection when the amp is overloading with power.. Or the amp is touching metal.. Or the ground wire aint in the right place..Or check your RCA's, Speaker wires? if their earthing your amp..

Jan 13, 2010 | Koiiler XM-8787C Car Audio Amplifier

1 Answer

I just dont know how to plug everything with it...Power button comes on if you move the amp...sparks if touches with a a screw....dont know which connections to put where


Black is ground(hook to a bolt going into metal on vehicle). Red is switched power(only on with ignition on). Yellow is power(power even if ignition is off). Blue is amp turn-on(located at radio and sends signal for amp to turn on). It is sparking because you do not have it grounded properly. You can damage your amp and or you car's electrical system....be careful. Always pull a main fuse or disconnect the battery when wiring a car audio system.

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1 Answer

Pulsing bass will juice you if you touch the wires


hahaha...sorry...I had to learn that the hard way too, some time ago. thats normal to get a little bit of a shock from an amplifier, if your colume is up a bit. thats real electricity running through your speaker wires. how bad the shock is depends on how high your volume is, and how big the amp is. good rule of thumb, always turn the volume on your stereo down before working on your amp.

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relatively simple 2 leg pot. fix.
Under $50 to repair.

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

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make sure your rca jacks arent touching any metal and your hot (+) cable is not ran on top of your rca jacks and check and make sure your frequencies arent too high

Mar 04, 2008 | Car Amplifiers

1 Answer

Whats this?


Hi, might be several reasons: 1) to loud, the amp might be auto protecting; 2) one of your 4 speakers has a developed an intermittent problem, either open or coil grounding to magnet; 3) the pigtail (wire from terminal to coil) might be occasionally touching the metal body of the speaker (just carefully bend/move the pigtail out of the way); 4)impedance mismatch (speaker ohms too low for the amp) or too many speakers connected (check/replace or lessen); or 5) it is possible that the amp is not getting enough power from the battery/electrical system or a loose ground somewhere (although a bit unlikely). Hope this be of some help. Please let us know how things turn up. Cheers.

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