Question about MTX JackHammer JH300 Car Audio Amplifier

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I have a MTX JackHammer JH300 and the power wires are conntected, grounded well and the REM is connected. The amp was working fine and stopped. I cannot get the amp to power on, although the fan will run so it is getting power.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

etirbynnor
  • 655 Answers

SOURCE: i have a mtx thunder 1501d..i have the power cord

Hello tonytone54, The ground should go directly to the vehicle frame, never through a cap, fuse, or anything else. Also, if you are connecting positive through a cap, make sure that you charge the cap before connecting it. Hope this helps.

Posted on Jun 03, 2009

MPetro302
  • 298 Answers

SOURCE: my MTX thunder 502x was working fine and know the

Could be a blown speaker/sub or a wire is crossed in the sub enclosure.

Posted on Jun 04, 2009

  • 2 Answers

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

  • 111 Answers

SOURCE: hi i have a mtx

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.
dreamsystems.

Posted on Feb 11, 2011

  • 2 Answers

SOURCE: My mtx JH300 amp is going in to protection mode what should i do?

have you checked the amp fuse ? also never connect while battery is connected. be sure to connect the amp to amp specs as stated in user manual i had the same problem and it was as simple as a missed connection however it could be a multitude of isues causeing the problem most of which are in the user manual. also check the earthing cable is hooked up and be sure no power supply is earthing out on the car. Protection mode is generaly activated when the amp isnt connected properly or by fault of power supply. double check evenrything and check again.

Posted on Nov 15, 2011

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1 Answer

Mtx jackhammer jh300


Try another set of speakers to see if that works. If so, it could be your subs. Also, check ohm reading on each sub.

May 13, 2014 | Car Audio & Video

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Car amp not working


is amp getting power or not could be wires came loose inside speaker box

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My mtx JH300 amp is going in to protection mode what should i do?


have you checked the amp fuse ? also never connect while battery is connected. be sure to connect the amp to amp specs as stated in user manual i had the same problem and it was as simple as a missed connection however it could be a multitude of isues causeing the problem most of which are in the user manual. also check the earthing cable is hooked up and be sure no power supply is earthing out on the car. Protection mode is generaly activated when the amp isnt connected properly or by fault of power supply. double check evenrything and check again.

Nov 15, 2011 | MTX JackHammer JH300 Car Audio Amplifier

1 Answer

Stopped working suddenly. No PF lights, no smell. Power light turns on sometimes. Fan turns on. Wired properly. No power to sub/subs.


check the fuse holder an the power holder on the inside of the amp an just to see check ur ground some time they lossen

Jun 21, 2011 | MTX JackHammer JH600 Car Audio Amplifier

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My MTX JH600 works intermittently. I don't hear the fans coming on at all and the amp doesn't seem to get hot. Even at low power the amp will turn off all of a sudden and then boom back on after...


One of my friends had a amp like that , i looked at it an the inside of speaker box wires was touching , if thats not it then check ur power an ground , power wire must be the same size ground an if ur ground is not grounded good then u will get the cuting out .

Jun 10, 2011 | MTX JackHammer JH600 Car Audio Amplifier

1 Answer

My MTX Jack Hammer JH300 Amplifier is warming up... A red led indicates that the amplifier is warming up.I checked the conections and everything seems to be ok, I've a 10" Jack Hammer JH 4510 Sub...


Check the speaker connections from the amp to the box and inside the box to the sub. Its possible these came loose from vibration. Also gently push in on the sub. It should move freely and feel spongy. If it drags or is stiff the sub may be bad. Use an Ohm meter and test the sub. There is an Ohm rating on the sub (usually 4) and it should be close to that. Also check the audio in. Maybe the amp/sub combo is fine but there is no sound going in. Use an MP3 player with a 3.5MM to 2M RCA cable as an input. Start with the volume all the way down and SLOWLY raise the MP3 volume.
Please Rate!

Apr 28, 2011 | MTX JackHammer JH300 Car Audio Amplifier

2 Answers

Amp is all hooked up and installed but sub is not making a sound. Problem with sub or amp?


Disconnect all speaker connections and rca cables. Leave power, ground and remote wires intact. Try turning on again. If you still have a protection light your amp is faulty. Double check all connections. GOOD LUCK. A thumbs up would be greatly appreciated if this answer is helpful to you. Worth fixing.
amp-all-hooked-up-installed-but-sub-not-flhv0giodkaywsjitcb2uyf1-2-0.jpg

Dec 01, 2010 | MTX JackHammer JH300 Car Audio Amplifier

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.

Oct 31, 2009 | MTX JackHammer JH300 Car Audio Amplifier

2 Answers

Mtx audio jh202 amp


my amp is blowing fuses?? any hints?

Feb 03, 2009 | MTX JackHammer JH202 Car Audio Amplifier

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