Question about MTX Thunder 1501D Car Audio Amplifier

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Mtx 1501d no sound

I have a 1501d that was working great when I shut it off. When I turned it back on later the red L.E.D. light comes on but no sound. The amp doesn't smell burnt. I unhooked everything and rehooked it back up just to check it over.... nothing. Hooked up another amp with same sub (15" 9500 mtx) and it worked fine. Does anyone know of same problem with these amps or how to fix. Thanks Fatcatfred

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  • Anonymous Sep 01, 2008

    i have the same probleme gos on red light but no sound comes out

  • Anonymous Dec 09, 2008

    is the 9500 a dvc or a svc??? i wanna say that the 1501 was a 2ohm stable amp,but you can still go under the ohms... i had 4 mtx9515's on 4 1501d's and i went under the ohm load and popped all 4 amps.... when you get a shot. mic the sub " voltage meter " and make sure that the sub is not throwing a bad load.... especially if the sub got warm it could clip the amp. and in turn pop goes the amp.....

  • monoblockluv Mar 13, 2009

    I have the same problem, i pulled the covers off and some of the transistors are totally fried. the ones that are visibly bad are....FET: 257 and FET:441,439,435,442,440,438,436. Also R436 (looks like a resistor) looks bad as well as R435. Does anyone know what these components controll? can i replace these?



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I have mtx 1501d and 81000d the 81 did same thing power with no sound.... layed amp down flat and it turned on. took lid off and not sure what they called but i put small chunk of padding on top of the lid so when i put my lid back on it pressed down on top the two round crazy looking balls of wires and bamb! amp was fixed still bumping it today mtx is great audio. its all i own. lol sorry guys in not sure what the things are called that need to be pressed onto board better but there was two of the right next to eachother and they red in color and are just bunch wire covered in glue.

Posted on Mar 08, 2013

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There are a number of things that can cause it to act as you described. Have you pulled the covers off of it yet to see if you can see any problems?

If you do, disconnect power from it and don't touch ANYTHING on the board when ANY of the 3 LEDs (2 are not visible from the outside) are lit.

Posted on Aug 19, 2008


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