Question about MTX Thunder 1501D Car Audio Amplifier

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My 1501d is making a wierd noise when i turn it on almost like an amplifed line noise but thats not the problem??

I have an mtx 1501d amp. that was hooked up to 2 kicker L7 15s and when i turn on my radio and turn the volume up in any way my subs start making a weird and really loud noise almost like an amplified line noise it use to work fine till i blew a tranistor i had all three in the set replaced and turned it on and it was working fine till it started to make this noise i hooked up another amp and they work fine all the subs are at the perfect ohms and wired right but the amp seems to have a prob. Any suggestions??

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I had the same problem. Its your rca inputs. They need to be resoldered.

Posted on Sep 08, 2011

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Also check to make sure that your RCA interconnects are good. If you are using interconnects that have a screw on top piece, make sure that they are all tight. This can induce all kinds of noise.

Posted on Jul 17, 2008

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Check for broken rca input GND.

Posted on Aug 09, 2007

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1 Answer

1501d,, What subs should i use/


I would stick with Kicker or MTX. The best place in my mind to get them is soncelectronix.com
Just try to mach the specs as close as possible. Make sure to look at the recommendations of the subs for the size of the box and the port volume.

Oct 11, 2009 | MTX Thunder 1501D Car Audio Amplifier

1 Answer

My subs make a loud humm when I turn my gain up.


your ground has to be no longer then 2 feet if ot it picks up noise from rca

Mar 13, 2009 | MTX Thunder 1501D Car Audio Amplifier

2 Answers

Need help MTX 1501d amp diagram


Remove cover and set in direct sunny window for long time, may be no problem with it, Took a month to dry one of my amps out enough that it decided it would come back to life, cell phone dropped in sink took 2 weeks, If you try power to it too soon --fried--, good luck finding diagram and repairing it sincerely-hope its okay, good amp, bad luck,

Mar 13, 2009 | MTX Thunder 1501D Car Audio Amplifier

2 Answers

Mtx thunder 1501d


yes you can not run amps with your speakers being grounded un ground and then try

Nov 26, 2008 | MTX Thunder 1501D Car Audio Amplifier

1 Answer

My mtx thunder 1501d car amp making noise in the subwoofers


This is common with pioneer head units, the rca jacks are not properly grounded and this lets engine noise come through the rcs cables. This thread explains a fix http://www.caraudio.com/forum/showthread.php?t=337644.

Nov 13, 2008 | MTX Thunder 1501D Car Audio Amplifier

1 Answer

Makeing poping noise


Although open shields on the head unit generally cause MTX amps to squeal, it can sometimes cause the symptoms you described. To check the shields, you will need a multimeter. The procedure is on the following page:

Testing for Open Shields on RCA Signal Cables

If the shileds are OK, we will have to check a few other things.

Nov 11, 2008 | MTX Thunder 1501D Car Audio Amplifier

1 Answer

Mtx 1501D


if your power light is on then check your preamps (sub out from head-unit).Maybe you need to turn on that output thru head unit's audio menu.Also when using dual voice coils if you wire them out of phase there will be no output

Sep 16, 2008 | MTX Thunder 1501D Car Audio Amplifier

2 Answers

Mtx 1501d no sound


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.

Aug 19, 2008 | MTX Thunder 1501D Car Audio Amplifier

1 Answer

Mtx 1501d


ARE U USING THE CONTROLS THAT CAME WITH THE AMP?
USUALLY THE CONTROLS CABLE GOES BAD

May 08, 2008 | MTX Thunder 1501D Car Audio Amplifier

2 Answers

Hi i have a mtx 1501 d


If it does it with no RCAs plugged in, the speakers or wiring need to be checked.

If the speakers and wiring are OK, the amp may have shorted output transistors.

Apr 10, 2008 | MTX Thunder 1501D Car Audio Amplifier

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