MTX Thunder 3401 Car Audio Amplifier - Answered Questions & Fixed issues

You are def overheating, If the ohms rating of the subwoofer is too low it will cause this same thermal over heat. If you have 2ohms in sub and a 4 ohms stable amp, you will overheat. Check the ohms rating of the sub to make sure this is not the problem

MTX Thunder 3401... | Answered on Feb 03, 2011 | 237 views

turn down music open sub box and put another speaker at wire and check again if work means sub is ok if not check the signal cable, and put there the speaker to try signal

MTX Thunder 3401... | Answered on Apr 06, 2010 | 227 views

If the amp produces no boom with no signal input cables connected, I'd suggest using an LOC.

Let me know if you have any other questions.

MTX Thunder 3401... | Answered on Sep 30, 2008 | 309 views

Check the ohm measurement of the speakers make sure they are about the rated ohms.Check them UNHOOKED from the amp. (Useually 4 ohms.)

Try different subs.

MTX Thunder 3401... | Answered on Jul 17, 2008 | 121 views

Kind of a vague problem description, can you be a little bit more specific. What problems you are experiencing, how many speakers/subs were you powering with it, does it show that it has power, did you check the fuses?

MTX Thunder 3401... | Answered on Jul 17, 2008 | 101 views

power to-battery plus



MTX Car Audio &... | Answered on Nov 05, 2019 | 148 views


MTX Car Audio &... | Answered on Sep 12, 2019 | 142 views

Try eBay Often available there from private sellers

MTX Car Audio &... | Answered on Aug 25, 2019 | 127 views

I was having a similar issue. I checked every wire from the battery to stereo to amp, checked the ground, pulled the stereo to double check the wiring was all correct. Everything seemed good so I thought it had to be my battery not putting out enough power. Tested it and it was good. What it turned out to be was the connection from the power cord to the battery. It had a tiny bit of built up corrosion that was making the amp go into protect mode. Cleaned it up and hooked it back up and has been golden since.
The link attached is pretty straight up on what you need to check for different circumstances. I'm guessing it's a low voltage issue. Good luck

MTX Car Audio &... | Answered on Aug 23, 2019 | 131 views

you have to first note the ohm load the amp can handle and wire the speaker that ther amp can handle

MTX Car Audio &... | Answered on May 13, 2019 | 54 views

Check the wiring 1st then go down the line...Check speaker connections..Look at your power,ground and remote wire hook up

MTX Car Audio &... | Answered on Oct 18, 2018 | 71 views

Since this is a vintage item, the cost is whatever the market will bear, wherever you're trying to sell it. I would suggest checking current prices on sites such as eBay, where one is currently being offered to sell at $200, while another is being offered for $90. The perceived value is what determines the selling price at this point, because the MSRP is long irrelevant by now, being that it's a discontinued item.

If you need further help, I’m available over the phone at

MTX Car Audio &... | Answered on Jul 08, 2017 | 58 views

The mtx thunder is a 4 channel amp. 4 channels can't be bridged to 1 speaker. You can only use one side of that amp to bridge your speaker. Unfortunately your now only using half your amp.

MTX Car Audio &... | Answered on Nov 25, 2016 | 441 views

You have a short somewhere in the speaker wires.

MTX Car Audio &... | Answered on Oct 05, 2016 | 147 views

250wrms is the highest they can take each. So look for an amp that does 500 wrms [email protected] 2 ohms or one that does 250wrms X2 @ 4ohms.

MTX Car Audio &... | Answered on Sep 01, 2016 | 195 views

Take both positive leads to the positive of the amp. Both negatives from the sub to the negative of the amp. Utilize the bridged output connections. This would present a 3 ohm load which would be around 100 watts rms (rough estimate)

MTX Car Audio &... | Answered on Aug 17, 2016 | 361 views

If you wish to get some details; check the site linked here. Pull up older posts.

MTX Car Audio &... | Answered on May 06, 2016 | 436 views

It is actually in the controller, if you turn the remote all the way down and press on the controller until the bass goes off, you will be able to turn the bass up and down with the remote, mine worked but stopped after a month, I tried adjusting the amp but then I noticed that if I wiggled the knob on the remote that it would work, I mashed mine until it worked again and velcroed it to my console sonibcan get it on and off easily.

MTX Car Audio &... | Answered on Jan 31, 2016 | 546 views

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