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MTX ThunderForms

1995-2003 Chevrolet S-10 Regular Cab, GMC Sonoma, Isuzu Hombre Regular Cab (Charcoal)

Item #: 236S11CTN

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Crinkled french fries, discarded receipts, old gum wrappers — you probably have everything in the hidden corners of your vehicle except great bass. But with custom ThunderForm enclosures, you can fill the nooks and crannies of your car, truck, or SUV with low tones that stand out.

MTX engineers evaluate the "sonic signatures" of top-selling vehicles so they can design ThunderForms as custom acoustic matches. With "rotational molding," MTX ensures that each ThunderForm fits and blends inconspicuously into your vehicle. They're made of high-density polyethylene resin to curb resonances and deliver bass that's tight, hard-hitting, and way down low.

This MTX ThunderForm comes loaded with a premium-quality 10" Terminator speaker and mounts behind the driver's seat on the 1995-2003 Chevrolet S-10 or GMC Sonoma, 1995-96 GMC S15, and 1998-00 Isuzu Hombre regular cab truck. The enclosure is seamless and airtight, with the correct internal volume to yield optimum bass response from the subwoofer. For the ultimate in Thundering bass, drive one with an MTX Thunder amp.

Product Highlights:

  • charcoal high-density polyethylene resin enclosure
  • single 10" Terminator subwoofer
  • mounts behind the driver's seat
  • frequency response 35-150 Hz
  • power range 50-225W RMS
  • warranty: 5 years (free repair or replacement for 2 years, prorated replacement for years 3 through 5)
  • Our 60-day money-back guarantee

Vehicle-specific enclosures with subs? Say what?

Instead of the usual sub in a box, the manufacturer creates a molded enclosure that fits perfectly into a convenient spot in your specific vehicle, housing a high-quality sub. Some enclosures even include a built-in amp, for the ultimate in stealth bass. The advantages? You don't lose much space (if any), your sub is perfectly matched to its enclosure, and your enclosure has a factory look that won't tell potential thieves you have an awesome sound system. Doesn't get better than that.

MTX ThunderForms Reviews

Average Customer Review:

1 Review

MTX ThunderForms

Written by: Sean M from Longmeadow, MA on March 12, 2012

It's funny, because this is backwards. The Sub sits directly behind the driver seat. If the Sub was positioned on the other side of the encloser it would have the sub in-between the seats and allow the sound to come out. You cannot put your seat all the way back because the sub hits the seat. I removed the jack and moved the box behind the passenger seat so the Sub is the in center of the truck and not blocked by the seat. I'm not overly impressed with the mtx sub. But with that said it is not terrible and worth the money. it has a tough time with the lower notes and you will find yourself keeping the crossover higher than you would like too. like I said earlier, it is worth the money for what you get and does sound great when the sub kicks at the center console and not the driver seat

Pros: value for money

Cons: terrible design. The Sub needs to be placed by the center console not behind the driver seat

Hands-on research

What's in the box?

Download owner's manual

  • Charcoal ThunderForm enclosure loaded with one 10" Terminator subwoofer
  • 2 Flat washers
  • Two 2" self-tapping screws
  • Manual
  • 1 "MTX Audio" sticker

Product Research



Molded Enclosure: The molded, high-density polyethylene resin enclosure resists flexing and dampens resonance.

Terminator Woofer:

  • Asymmetrical Linear Drive System (ALDS): The Asymmetrical Linear Drive System consists of a flat, progressive spider that improves suspension and an extended vented pole piece that smoothes out the cone's linear motion. The result is high output and low distortion.
  • Spider Plateau Venting: Heat from the voice coil is vented through metal-mesh covered vents that surround the back of the spider.
  • Voice Coil: The voice coil is wound on a high-temperature former to promote high power handling.
  • Strontium Ferrite Magnet: The strontium ferrite magnet yields a highly efficient speaker.


5 Year Warranty Terms: This product carries a 5-Year Prorated Warranty with the following terms:

  • Years 1-2: Products found to be defective in materials or workmanship during the first two years will be, at Mitek's option, repaired or replaced by Mitek at no charge. The warranty period does not renew, but continues on from the original date of purchase.
  • Years 3-5: The purchase price of an item which becomes defective after the first two years and prior to the end of the warranty period will be prorated and credited toward the purchase of a new MTX product. The amount of proration is determined by dividing the original purchase price by the number of months in the warranty period (60), then multiplying the result by the number of months remaining in the warranty period.

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