MTX ThunderForm Unloaded Enclosure

Holds a single 10" sub — fits 2001-06 Chevy Tahoe

  • MTX ThunderForm Unloaded Enclosure

    Sub not included

  • MTX ThunderForm Unloaded Enclosure

  • MTX ThunderForm Unloaded Enclosure


Our take on the MTX ThunderForm Unloaded Enclosure

by Jo Greene

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.

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This black enclosure comes without a speaker — you install your favorite 10" subwoofer. For best results, MTX strongly recommends using a speaker designed for an enclosure with a volume of 0.8 cubic feet. The enclosure mounts under the driver's side rear window in the cargo area of select 2001-06 Chevy Tahoe vehicles.

Please check with us before purchasing by using the vehicle selector on our site, or calling an Advisor at 1-888-955-6000 to verify fit information.


  • custom-fit black subwoofer enclosure for 10" sub
  • mounts under the driver side rear window in the cargo area (behind the factory panel)
  • fiberglass construction
  • volume: 0.8 cubic foot (sealed)
  • dimensions: 27-13/16"H x 17"W x 10"D
  • mounting depth: 4-13/16"
  • warranty: 5 years (free repair or replacement for 2 years, prorated replacement for years 3 through 5)
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Box Type Sealed
Number of Boxes 1
Number of Speakers Per Box 1
Speaker Size 10
Cutout Diameter or Length (inches) 9 3/16
Maximum Speaker Depth (inches) 4-5/8
Box Volume (cubic feet) 0.8
Tuning Frequency N/A
Height (inches) 27-7/8
Width (inches) 17
Depth (inches) 10
Second Depth (inches) 10
Wood Thickness (inches) 0
Speaker Wire Connectors Spring posts
Box Color Black
Box Finish Fiberglass
Parts Warranty 5 Years (3-5 Prorated)
Labor Warranty 5 Years (3-5 Prorated)
Product Research
What's in the box?

Download owner's manual

  • Custom-fit unloaded 10" subwoofer enclosure
  • Grille
  • Hardware
  • Installation instructions

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.



Vehicle-Specific Custom Enclosure: The enclosure mounts behind the rear quarter-panel, under rear-window, on the driver-side of cargo area in a 2001-2006 Chevy Tahoe, 2000-2006 GMC Yukon (not Denali), or 2002-2006 Cadillac Escalade (Not EXT or ESV).

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

Construction: The enclosure features fiberglass construction.

Tools For Installation:

  • Powered screwdriver
  • #2 Phillips head bit
  • 6" Bit holder extension
  • Socket wrench
  • 10mm Socket
  • 7mm Socket
  • Cutting tool
  • Felt-tip pin


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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MTX ThunderForm Unloaded Enclosure Reviews

Average Customer Review:

3 people say:

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4 out of 5

Also fits Denali (with modification)

Written By Kevin, Maryland on Sunday, July 27, 2014
Crutchfield Customer Review (What's this?)
I purchased this item for a 2005 GMC Yukon Denali. According to the description this item doesn't fit that model. With a minor modification I was able to install without issue. All that was needed was to remove the threaded bolt that held the tire jack in place. The jack had to be installed in another location (above the Thunderform). All in all it worked out great and the only minor complaint is the high price. If you're looking for a way to mount a shallow sub and save space then this is a very good option.
Securely fits in confined area to save space Relatively easy to install
Very expensive (would have rated 5 stars if price was more reasonable)
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3 out of 5

MTX ThunderForm Unloaded Enclosure

Written By MyNumber, San Pedro, CA on Wednesday, January 08, 2014
Crutchfield Customer Review (What's this?)
The item is a lot more sturdy than expected. I have yet to install the device, will update in the near future.
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5 out of 5

MTX ThunderForm Unloaded Enclosure 2202 Tahoe

Written By Jimmy, Helotes, Texas on Tuesday, October 22, 2013
Crutchfield Customer Review (What's this?)
Just what the old girl needed. Fit's awesome and sounds so much better then the stock POS. Highly recommend.
Cheaper to buy unloaded and buy the woofer seperate, install it yourself and save $$$$$$.
None yet.
3 out of 3 people found this helpful
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1 question already asked

This does come with a sub right? [ Brandon  Sep 08, 2014 ]
5 answers
  • No, bought sub separately. [ Arthur   Sep 11, 2014 ]
  • It doesn't. A loaded enclosure means that it come pre equipped with subwoofer and/or amplifier and unloaded means that the enclosure is the only thing you get. [ B   Sep 09, 2014 ]
  • No. Sub is NOT included. [ KEVIN   Sep 08, 2014 ]
  • No, Hence the Unloaded. But pick a Speaker that fits or you will be doing some modifications. [ WAYNE E   Sep 08, 2014 ]
  • No. Mine came only as an empty enclosure that you put your own sub in. They have a "Loaded" enclosure that you can order that includes a sub, just cost more. [ DAVID   Sep 08, 2014 ]

Add accessories for the MTX ThunderForm Unloaded Enclosure

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T-Spec 16-gauge Speaker Wire Black/white jacket — priced per foot
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For a more in-depth review and enhanced detailed information on the MTX ThunderForm Unloaded Enclosure, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_236T01B10U/MTX-ThunderForm-Unloaded-Enclosure.html ).