MTX ThunderForms

2007-up Chevrolet Silverado and GMC Sierra Extended Cab (Black, w/ 10" sub)

Item #: 23615XTN

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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. ThunderForm enclosures fill the nooks and crannies of your vehicle with low tones that stand out, but their factory look blends right in.

MTX engineers evaluate the "sonic signatures" of top-selling vehicles so they can design ThunderForms as custom acoustic matches. Each ThunderForm fits and blends inconspicuously into your vehicle, so you get great bass without losing any space. They're made of high-density polyethylene resin to curb resonances — they deliver bass that's tight, hard-hitting, and way down low. The airtight enclosure provides the correct internal volume to yield optimum bass response.

This ThunderForm fits under the rear seat of your 2007-up Chevy Silverado or GMC Sierra extended cab pickup. The enclosure houses a rugged Terminator subwoofer — its strong, light cone and special suspension design ensure high output and low distortion.

Product Highlights:

  • custom fit subwoofer enclosure
  • black high-density polyethylene resin enclosure
  • mounts under the rear seat
  • single 10" Terminator 4-ohm subwoofer
  • power range: 50-225 watts RMS (450 watts peak power)
  • dimensions: 9"H x 36-1/5"W x 16-2/5"D
  • 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.

Hands-on research

What's in the box?

Download owner's manual

  • Custom-fit pre-loaded enclosure
  • Mounting hardware
  • Installation Instructions

Product Research

Features
Warranty

Features

Vehicle Compatibility: This MTX ThunderForm custom-fit, pre-loaded enclosure is designed specifically to fit select 2007 and later Chevy Silverado and GMC Sierra Extended Cab Trucks.

Note: Please refer to the Crutchfield Vehicle Selector to confirm fit for your vehicle.

Mounting Location: The ThunderForm pre-loaded enclosure mounts under the rear passenger seat. (install hardware supplied). There is no loss of leg room.

Molded Enclosure: The molded, fiberglass enclosure resists flexing and dampens resonance.

10" Terminator Subwoofer: This enclosure comes loaded with a single 10" MTX Terminator woofer (4-ohm).

Warranty

5 Year Warranty Terms: Starting January 1st, 2013, 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.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

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Get everything you’ll need to enjoy your new MTX ThunderForms

You'll need speaker wire to get the signal from your amp to your sub.
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Questions & Answers Ask the community. Share your knowledge.

1 question already asked

It requires a separate amp but sounds good for an 8" sub. [ DANIEL R  Aug 19, 2014 ]
No, lots of power [ CHARLES A  Aug 19, 2014 ]

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