Question about MTX Thunder 8302 Car Audio Amplifier

1 Answer

Amp not workign!

So i got two JBL gt10801 subs that are 250 rms each and i think SVC 8 Ohm Impendance..I also got MTX Thunder 8302 amp along with it.. I wanted to test my subs since i did not have wiring for my car yet so my friend hooked up one of the subs to one of the channels of and it was pounding good. Then he hooked up the other sub to to the other amp and everythign was sounding pretty good for how much wattage the amp was giving out. I dont know what he was doing but i know he was playing with the buttons and stuff on it (amp over and rca over). I told him before to tighten the ground properly but he said as long as its touching then its good. So the amp was on the sub box and all of a sudden there is no more bass. My bro says shut it off becuase he smelt something liek burning rubber. We checked and it was coming from the amp, and the groudn wire wasnt in teh back of the amp. The amps red light turns on but sometimes takes forever to turn off even when the power cable is out, and there is no power at all going to the subs. Anyone have any suggestions, and if my amp is a lost cause? How much the price would be to repair? Thanks alot!

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 3,130 Answers
Re: Amp not workign!

The way you were testing the amps is a common way that alot of people do and this is the main caise for the amps to blow up.. An amp should always have a BOLTED ground and B+ connection as well as good speaker connections to ensure no intermittant connections. When the intermittants do occour, these solid state amps are very unforgiving and will instantly short out one or more of the output devices or take out the switching power supply. Im afraid you cannot guess with the repair price on a unit like these, as it could have taken out one resistor or a whole line of solid state output devices. the only true way to tell would be to bench test the units with the proper equipment. I would be quessing, your repairs are going to go from 65.00 all the way up to 200.00 bucks, most likly excedding the cost of most amps.

Posted on Oct 07, 2006

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

Can you bridge 2 4 ohm kicker speakers to a mtx thunder 7801 amp?

Ya. Just hook one sub to your amp (bridged) and hook the other sub (positive and negative) to the first subs positive and negative

Nov 12, 2010 | MTX Thunder TA7801 Car Audio Amplifier

1 Answer

MTX 8302 sound just quit on front speakers

hi Dan....Have you had any other service or installs shortly prior to the onset of clipping? In any case, the 8302 has Onboard Thermal Protection which is kicking in due to excessive heat. If you've had this running fine for a period of time, by that I mean at least a month, then we need to focus on why you're suddenly overheating......please update your post with any further information and progress.....good luck my friend

Aug 04, 2007 | MTX Thunder 8302 Car Audio Amplifier

1 Answer

Will a 300 rms amp power a cerwin vega vmax 124?

Hello dustin_stewa,

300 watts RMS is a little on the low side, but it'll power the sub. The sub is rated for 500 watts RMS.

If you haven't already purchased the amp, I'd recommend considering one with a little more output, perhaps in the range of 400-600 watts RMS.

Hope this helps.

Oct 19, 2009 | MTX X Thunder 300XD Car Amp

1 Answer

Low output from T8302 MTX Thunder AMP

It sounds like an Ic is to blame, Check individual channels to find which one is not working?

Jun 11, 2009 | MTX Thunder 8302 Car Audio Amplifier

1 Answer

Need proper wiring details.

This is a dual 4 ohm sub. By wiring the terminals in series (one set of + to - from one side to the other) you will have an 8 ohm sub (most folks probably don't want this). By wiring in parallel (+ to + and - to - and connect the - wire to the - terminal on your amp and the + wire to the + terminal on your amp you'll have a 2 ohm sub.

Mar 12, 2009 | MTX TA4501 Thunder 4501 MonoBlock Car...

1 Answer

Tuning 8302 amp

The amount of power that youre going to run on those 5.25s might indicate that you need to turn the crossover to a higher cutoff frequency because they gonna want to kick pretty hard if your set too low - Sounds like you got it under control though flip it to high-pass(HP) and see how it does at around 100 HZ cutoff- be sure to turn off any bass boost on the amp though too- Let me know how them soundstream mids do- I have a set of subs that kick *** but i never have heard anything about their mids-good luck

Oct 18, 2008 | MTX Thunder 8302 Car Audio Amplifier

1 Answer


I looked up that amp, it doesn't have a listing for 2ohms x1 but it has 2 ohms x 2 and its at 250watts. For this situation, I would recommend a different amp or different subs. Right now you are getting the most you can get out of your sub/amp combo, if you only have single voice coil subs. Which is common in the mtx preloaded boxes. Either you want an mono block amp stable at 2 ohms or 2 dual 4 ohm voice coil subs. If you got the subs you would wire the voice coils in series so you could get 8 ohms then the subs in parallel so you could get 4 ohms, which would be the best for that particular amp. Good luck.
-Andrew Hawkins

Aug 23, 2008 | Legend LA1490 - American Legacy Series 2 -...

1 Answer

Cant figure out my car audio problems!!!!!

There are a couple of tests you can perform. I'd first recommend checking the shield ground. You'll need an ohm meter. The details can be found on the following page.

RCA shield ground test

You can also test the output with the multimeter. Set the multimeter to AC volts. If it's not an auto-ranging meter, set it to a voltage range of ~2v AC. Disconnect the RCA cables from the head unit. Touch one meter probe to the outer ring of the head unit's RCA jack. Touch the other probe to the metal contact in the center of the RCA jack. With the head unit near full volume and a clean signal source, you should read at least one volt on musical peaks. If you have a bass disc or a test tone disc (~60hz sine wave), use those.

May 04, 2008 | MTX Thunder 8302 Car Audio Amplifier

1 Answer

MTX Thunder 8302 Car Audio Amplifier

could be bad mosfets or outputs, needs replace

Aug 05, 2007 | MTX Thunder 8302 Car Audio Amplifier

1 Answer

Subs will go off the wall with bass, but not in tune with music.

hi, first disconnect the rca input, then switch on headunit and if the amp produces a constant bass thump it then means it has an internal fault. if the amp idles quietly then replace the rca cable, or try connecting the headunit lineout feed directly to the bass amp, in this way you cud find out if your fault is coming from the headunit or the equaliser. cheers

Nov 23, 2006 | MTX Thunder 8302 Car Audio Amplifier

Not finding what you are looking for?
MTX Thunder 8302 Car Audio Amplifier Logo

55 people viewed this question

Ask a Question

Usually answered in minutes!

Top MTX Car Amplifiers Experts


Level 3 Expert

56925 Answers

Matthew Spark
Matthew Spark

Level 3 Expert

1042 Answers

Larry Spears
Larry Spears

Level 3 Expert

625 Answers

Are you a MTX Car Amplifier Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides