Question about Sony Xplod XM-554ZR Car Audio Amplifier

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Amp cuts out

My amp worked great for a day or 2 then it started cutting out and now it only hits about 4 or 5 times times then the thermal light comes on and it dont work until the light goes off. what is my problem? this sux

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Check your ground wire that's more than likely the problem.Try grounding it in a different spot make sure your ground is a paint and dirt free surface also make sure its directly metal to metal.

Posted on Nov 09, 2008

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Music plays for a while, depending on the weather and how hot it is and then it just cuts off and the protect light comes on. Had this amp for 4 years and no problems till now. Some days I can listen the...


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I installed a MTX Thunder 3401 with a PA sub. after turning the car oh every things works great. After about 2 mins of play, the thermal light begins flashing red and it will shut off the amp. After the...


You are def overheating, If the ohms rating of the subwoofer is too low it will cause this same thermal over heat. If you have 2ohms in sub and a 4 ohms stable amp, you will overheat. Check the ohms rating of the sub to make sure this is not the problem

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What may of happened if that you got the lacquer finish on the electromagnetic wire to heat up and come apart. At low volume they will still have an electric connection. Because the wire physically came off from the inner housing of the voice coil it is in contact with the side wall of the speaker magnet and is proned to causing a short between coil sets. Your probably running subs with a 4 ohm impedance and when your coils short it acts more like a 2 or 1 ohm speaker. This is similar to whats called a dead short. Since the Independence is dropped to 2 or 1 ohm it is the resistance equivalent of having 2 or 4 subs attached to your amplifier which caused the final transistor bridge to heat up and it can get hot almost instantly. Check your amps outputs individually on a single speaker that you know works perfectly. If your amp does not trip the thermal protection you most likely cooked a speaker beyond usable condition.

May 24, 2010 | Jl Audio 500/1 Car Audio Amplifier

3 Answers

Red thermal light on


well id say you have cooked your amp and or subs they can only take beatings for so long. show it no mercy it gives it back,does amp smell do subs smell borrow amp see if subs are ok if so it will be your amp.new one .keep the gain down??

Jun 11, 2009 | Rockford Fosgate Punch P550.2 2-Channel...

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Car Audio problems


If your voice cuts off when you use too much power i.e. operating power windows you are taking power away from your amp. An amp operates in stages; therefore you must increase the available (battery) power in your vehicle; possibly you can run two batteries (do not connect them in series)

May 14, 2009 | Car Amplifiers

1 Answer

No sounds coming out of subwoofers


CHECK INSIDE UR SUBWOOFER BOX ...

Apr 11, 2009 | Pyle PLAM2300 Car Amp

2 Answers

When powered on protection light comes on


ya i would say its not grounded right

Mar 02, 2009 | Car Amplifiers

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,

Shuttle83

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

2 Answers

Amp cuts off


You may have a problem with the power source feeding the amp. You need to check the voltage across the amplifier's B+ and ground terminals when the amp is playing/cutting off. If it's dropping below ~11 volts, you need to determine why it's dropping so low.

Sep 18, 2007 | Alpine PDX-1.1000 1000W x 1 Car Amplifier...

1 Answer

My amp turns on then the music cuts in and out


check your main ground, if possible try to read voltage across making sure 12-14v present with load and some signal.

Aug 08, 2007 | Verge VGA285 Car Audio Amplifier

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