Question about Sony XM-475GSX Car Audio Amplifier

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Amp my MA audio m686i amp goes into procetion mode with nothing hooked up besides the power cord what seem to be the problem

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The amplifier may be bad with a malfunctioning circuit inside. Also, it could be getting low voltage...make sure that the amp is getting 12 volts or more at the constant and remote leads. If it is connected to speakers, make sure that they are measuring more than 2 ohms (using a voltmeter). A good stereo shop can check this for you too.

Posted on Aug 10, 2008

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Posted on Jan 02, 2017

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I have a 800 watt ma audio i was loosening speaker clamps when one my kids turned tunes on and i touched amp with wrench causing a spark immediately shut car down but got a burnt smell. Protect light...


Afraid you may have blown an amplifier. If you have a AC voltmeter, audio generator and schematic, you can feed audio signal into unit and track the signal on both channels during amplification stages.and locate the spot where the amplification stops or one channel deviates from the other. And there is your culprit.

Sep 05, 2017 | MA Audio Car Audio & Video

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I have a 1400 watt cruch amp & i hooked it up myself. when i turn the radio on the power wire on the amp comes on, bt if the audio cords are hooked up, the protection light comes on. if i dnt hook the...


Should the amplifier go into protect mode, simply disconnect all RCA and speaker leads, while keeping +12 volt, power ground and remote leads connected.

1. Now turn the amplifier back on, and if the diagnostic LED lights, the amplifier has an internal fault.

2. If not, plug the RCA cables back, and reset the amplifier. If it goes into diagnostic now, the fault lies in the input, either with bad cables or source unit.

3. If the amplifier seems fine with RCA cables plugged in, connect the speakers, one at a time, and if one of the speakers or its wiring is faulty, it will activate the diagnostic
system.

Dec 08, 2010 | Mobile Authority A-500 Car Audio Amplifier

1 Answer

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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JBL GTO 301.1ii protect mode


Hello roets81,

Check the voltage at the amp. It's possible that the voltage is either too high (above 16V) or too low (below 8.5V). Also make sure that the amp case is not grounded. If these check out OK, the most likely cause is that the amp itself is defective and requires service.

Hope this helps.

May 27, 2009 | JBL GTO 301.1 Car Audio Amplifier

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you have definately blown a output channel, or power supply. Send it in for warranty.

Jan 09, 2009 | MA Audio HK4000D Car Audio Amplifier

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Premier sub used to work great ... now nothing


Did you check to make sure that you didn't blow a channel in the amp? Another thing to check would be the connection on the inside of your box, maybe there is just a wire loose.

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1 Answer

Car audio amp in protection mode


If you power up the amp with the RCAs plugged in, does it go into protection mode.

If you power up the amp with the RCAs plugged in, does the woofer pop?

Oct 26, 2008 | Pyle PLAD413 Car Audio Amplifier

1 Answer

Amplifiers


It sounds like you've got too little impedance on it. How are the speakers wired? Are they in series (one speaker per channel) or are they in parallel (speaker 1 neg wire hooked up to channel 2, and speaker 2 neg wire hooked up to channel 1)? Or do you have a single speaker bridged (pos wire on one channel, neg wire on the other)? Often, an amp going into protection is a result of too much current draw, which happens when you're running a 2-ohm load on an amp that isn't rated to handle that (many are only OK at 4-ohms, which you'd have with series wiring). Let me know how you have the speakers wired and we'll go from there.

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2 Answers

MA Audio HK4000D please help me ?


Turn the system off and disconnect the speakers. Turn the system on. If the amp still goes into protection mode with no speakers connected, then most likely the output transistors are bad. If the protection light is off, hook up one sub at a time until you find the one that is causing the problem

May 21, 2008 | MA Audio HK4000D Car Audio Amplifier

2 Answers

Amp heats up and goes into protect mode


Hi Saint108. You're describing it well, and i know what the problem is already. The MA audio amp, can't hold with a 2 ohm load. It's too low for that amp, that's for sure. Those are budget amps and they are not well built enough to handle low ohm setups like that. It's overheating and there's no ways around it.. Other than wiring your subs differently ! Just wire your sub directly (not in parallel) in a 4 ohm load, you will notice it will stop overheating that much. Do it quick, you'll most likely fry your amp giving it such hard work !! The HUM you're hearing could be related to it also. Try that, and keep me posted on the status. Thanks ! Cheebster.

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