20 Most Recent MTX Thunder 3401 Car Audio Amplifier - Page 2 Questions & Answers

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 https://www.6ya.com/expert/reginald_bec291de192ca44f

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.

Output fet blown.

You have a short somewhere in the speaker wires.

250wrms is the highest they can take each. So look for an amp that does 500 wrms x1@ 2 ohms or one that does 250wrms X2 @ 4ohms.

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)