Question about JVC AM FM CD DET FACE CAR STEREO

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Amplifier Issues hey i have a sony 500 watt amp and for some reason it keeps getting hot and shutting off really fast if i turn it up... if i keep it down it works fine but as soon as i proceed to turn up the volume it will last a minute or two and shut off. then the amp will not return to its normal state until the truck is shut off and turned back on.( im assuming letting the amp reset.) i had the amp in a different car before and it worked fine. i could crank it all day and it was cool... what do i do!?!?!

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  • 2 more comments 
  • chuck4sho Jan 21, 2009

    it is a sony x-plod XM-504z amp on a chip foose arc audio 10".

  • chuck4sho Jan 21, 2009

    i think it is a dual voice coil....

  • blueextc3221
    blueextc3221 May 11, 2010

    dual or single voicecoil?

  • blueextc3221
    blueextc3221 May 11, 2010

    please reply with the speakers attached to the amplifier and the model # of the amplifier so I can be of some assistance.

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  • Master
  • 15,935 Answers

HERE is the manual for your amplifier.
It is listed as being 4ohm STEREO stable Bridged.
Meaning the lowest impedence possible on (2) bridged channels is 4 ohms.
If you have a Dual Voicecoil Subwoofer, chances are - it is wired in parallel - resulting in a 2 ohm load.
This low resistance causes rapid heat buildup, and is causing your amplifier to go into protect mode.
There are many reasons the amplifier is doing it NOW as opposed to the prior vehicle...
If you alternator is not giving your amplifier 14V, it must work harder to produce the same amount of power. WORK = HEAT!
If the head unit is not the same, the signal voltage also has an effect. If the voltage is lower, the amplifier has to work harder to keep up at the same "volume" setting.
In any case, you are over-driving the amplifier, and it is shutting down with its thermal protection circuit.
Either lower the gain on the amplifier, or purchas a mono channel amplifier made to drive subwoofers.
Your Subwoofer is craving power, and you're giving it 60W !!

Thank you for using FiXyA - A FiXyA rating is appreciated.
If you have more questions or need clarification - let me know!

Posted on Jan 21, 2009

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