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My MTX JACKHAMMER 1200 amp keeps blinking yellow light and amp won't power on.

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Posted on Jan 02, 2017

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SOURCE: No LED power lights go on

the light with the power light(middle) is a blue/purple faint light try checking it out at night.The squiggy(as heat waves) will only light when the amps shuts down due to thermal protection(wait for it to cool). The bolt/yellow (short circuit) will light when there is an electrical overload in any of the wires(check +ve leads).

Posted on Jun 21, 2009

SOURCE: Apx stopped working, MTX 702x

maybe the audio amplifiers Ic´s damaged or the power fet

Posted on Mar 06, 2009

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SOURCE: my sony xplod 1200 whatt amps red light keeps comi...

check your ohm load on the sub and see if your amp can do the same, That is why every time it shuts off into protection mode. Check your gain level on the amp to this is not a volume knob for your amp, It is to get both the amp and cd player on the same page. Hope this was helpfull

Posted on May 27, 2010

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Mtxjh1200 , the light with the lightning bolt blinks and subs make a thumping sound like a heartbeat


ur rca wires or its the holder itself if the subs do it when the rca wirtes are off the oits the bord inside the amp

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Hi i have a mtx jackhammer JH202 amp and a mtx jackhammer jJH5510D sub and every so often when a song is playing there will be bass and al of a sudden it will shut off and after a few minutes it will come...


The problem was caused by you trying to run a 2OHM load on an amplifier which is designed to run only on 4OHM when it is bridged, the amplifier is most definatley cooked. An authorized MTX technician should take a look at it, to determine just how wide spread the damage is.
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It wont turn on, it give me a flashing light on the flash sign..


please run a thicker power and ground if u have already check ur fuse on the power make sure its a big enough amp fuse for the amp

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1 Answer

The light that has the lightning icon keeps blinking continous. what could be the problem


Hello djmalibu77,

You do not say if the amp has been installed and working properly for some time or if the problem began immediately upon installation.

If the amp was just installed, I'd suspect a wiring problem. Either a faulty ground or too low of an impedance.

If the amp has bee working properly and the problem just started, I'd start by removing all connections except ground, power, and remote and see if the amp powers up properly. If it does, reconnect the wiring one at a time to determine where the faulty wire or component is located. A grounded or shorted input, shorted voice coil, or a short or ground in the output wiring will cause an amp to go into protection. If these all check out, it's probably a fault in the amp itself.

Hope this helps.

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check that the ground wire is bolted tightly to the chassis of the vehicle.

Aug 08, 2009 | MTX JackHammer JH600 Car Audio Amplifier

1 Answer

No LED power lights go on


the light with the power light(middle) is a blue/purple faint light try checking it out at night.The squiggy(as heat waves) will only light when the amps shuts down due to thermal protection(wait for it to cool). The bolt/yellow (short circuit) will light when there is an electrical overload in any of the wires(check +ve leads).

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Mtx audio jh202 amp


my amp is blowing fuses?? any hints?

Feb 03, 2009 | MTX JackHammer JH202 Car Audio Amplifier

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