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MTX Vehicle-specific Unloaded Enclosure

Holds a single 12" sub — fits 2004-08 Ford F-150 SuperCrew and SuperCab (Charcoal)

Item # 236150C12U

Crinkled french fries, discarded receipts, old gum wrappers — you probably have everything in the hidden...

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Crinkled french fries, discarded receipts, old gum wrappers — you probably have everything in the hidden...

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Item # 236150C12U

Ships from manufacturer

$349.99
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About the MTX Vehicle-specific Unloaded Enclosure

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.

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 enclosure comes without a speaker — you install your favorite 12" subwoofer. For best results, MTX strongly recommends using a speaker designed for an enclosure with a volume of 0.94 cubic feet. The enclosure mounts under the driver's side rear seat of select 2004-08 Ford F-150 SuperCrew and SuperCab pickups. The seat still folds up and down, and the jack stays in its factory location.

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.

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Product highlights:

  • custom-fit charcoal subwoofer enclosure for 12" sub
  • mounts under driver's side rear seat
  • fiberglass construction
  • volume: 0.94 cubic feet (sealed)
  • dimensions: 8-1/4"H x 34-1/21"W x 14-1/2"BD x 14"TD
  • mounting depth: 5-3/4"
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # F150C04C12U

What's in the box:

  • Custom-fit unloaded 12" subwoofer enclosure
  • Hardware
  • Installation instructions

Customer reviews

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MTX Vehicle-specific Unloaded Enclosure reviews

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2 reviews

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Sounds great but way over priced

Andy M from Arizona on 9/26/2015

Verified customer (What's this?)
Verified employee purchase (What's this?)

This unit fits perfect into a 2006 F150 - I installed a JL Audio 12TW1-2 - It was a very tight fit but it really sounds great. I think MTX could sell many of these boxes if they lowered the price. Also it is one of the only premade boxes that holds a single 12 and only takes up 2/3 of the under seat space (keeping the jack in place). Very happy over all.

Pros: Great Fit, Can keep the jack where it is, Fits a 12" sub

Cons: Over priced

Crutchfield response on

2 of 3 found this helpful

MTX Vehicle-specific Unloaded Enclosure

jonH from manassas va on 8/20/2013

2004 Ford F-150

Verified customer (What's this?)
Verified employee purchase (What's this?)

i purchased this box for my 12" rockford fosgate P3s for my 2004 ford f150 super cab (extended cab) because the box my sub came pre-enclosed in did not fit well in my truck, the price is a little steep, but the quality is great. for those of you that do not know, this box is not made of a wood, its almost like a hard composite plastic..but dont let that scare you. the box comes with the cables and ports ready to plug and play with slide on fittings, ( these dont work on push open release speaker wire inputs) so i cut them off stripped the wire and installed. this box did come pre-insulated and install was pretty straight forward, nothing tricky about it. now the sound quality in my opinion coming from this box is impressive, and made a big difference on the audio in my truck *** side note *** this sub is accompanied by a ken wood 1000 watt amp, rockford fosgate prime speakers, and the pioneer app radio head unit. i would also recommend if you do already have a sub enclosure keep your old enclosure and hardware for future use this box is only going to fit in the specified vehicle application

Pros: fits snug under seat sound is great easy to install pre insulated/ pre ported

Cons: only fits my f150 and wont be transferable

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0 of 1 found this helpful

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More details on the MTX Vehicle-specific Unloaded Enclosure

Pat M.

Product Research

Features

Vehicle Compatibility: This Bass Slammer custom-fit enclosure is designed specifically to fit the 2004-2008 For F-150 Super Crew & Super Cab pickup truck

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

Mounting Location: The enclosure mounts under the rear passenger seat of Ford F-150 Super Crew/Super Cab trucks. The rear seat will still fold up and down, while the jack remains in its factory location.

Enclosure Type: The sealed enclosure features fiberglass construction and fits one 12" woofer.

Tools For Installation:

  • Powered Screwdriver
  • #2 Phillips head bit
  • 5/16" Wrench
  • 7/16" Socket
  • T-50 Torx

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Customer Q&A

1 question already asked

Q
Does this fit a full size 12 or just shallow mount?
[ brandon  Sep 28, 2017 ]
1 answer
A
Just a shallow mount. Also, the sub will sit down into the box a little so make sure the outer ring (where you put the screws) is not too large in diameter so it will sit down in this inset.
[ RYAN  Sep 28, 2017 ]

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