Question about MTX Thunder® TC8001 Car Amp

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No output light on top of amp lit, also light by speaker output lit.

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Sounds like something internal as long as you have a good ground and power but remember that there is a remote power too, that is supose to hook up in the back of stereo so there are two power lines that are for the positive side of amp and one ground

Posted on Mar 24, 2011

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  • Greg Adams
    Greg Adams Mar 24, 2011

    can you explain the operation of the 2 lits

  • Joseph Minkin
    Joseph Minkin Mar 24, 2011

    if there is two lights one usualy is power and the other is overload or protect which means it was over powered or hookedup wrong

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Red light is on if:
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- DC at speaker terminals
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Also could be a protection circuit malfunction.
In any case you need new channel module or send your module or whole amp for repair here.
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It probably has shorted output transistors. To eliminate other possible causes, read through the following page.

Amplifier in Protect Mode - Troubleshooting

Let me know if you have any other questions.

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Hi i am matt


If the protection LED lights only after the remote voltage is applied (head unit is switched on), the amplifier likely has shorted output transistors. If the protection LED remains lit without remote voltage applied, the amp may have other problems.

Does the protection LED light with no speaker wires connected to the amp and no RCAs plugged into the amp?

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1 Answer

No sound


did you set your gains and base boost also when you put sterio back in dash did you put rca's on proper outputs or the rca's could have pulled out when putting back in
you have high output and low output

are your subs getting sound to them at all any current going threw speaker wires to subs
radio settings might not be set to back end for subs this is a feature on most receivers to shut off back end subs

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My amp is on but the protection light stay's on!!


Disconnect all speaker wires from the speaker terminals of the amp and disconnect signal cables from the amp. If it powers up, the wiring needs to be checked. If the protect light remains on, the amp likely has blown output transistors.

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