MTX Vehicle-specific Unloaded Enclosure — Single 12"

For 2004-up Ford F-150 Crew Cab (Black)

  • MTX Vehicle-specific Unloaded Enclosure — Single 12

    Shown with subwoofer installed


Our take on the MTX Vehicle-specific Unloaded Enclosure — Single 12"

by Dominic Devito

MTX vehicle-specific unloaded enclosures preserve all the legroom in pickup trucks and all the cargo space in SUVs. Each enclosure is an acoustically-designed, non-resonant, airtight enclosure, with the correct internal volume to yield optimum bass response from a compatible subwoofer.

So what makes these enclosures different than a standard sub box? MTX designs each enclosure for optimum performance in your specific vehicle's acoustic space. Using state-of-the-art rotational molding techniques, and exotic high-density polyethylene, MTX creates a sculpted masterpiece of a sub box, beautifully finished to blend with your interior. And they sound as good as they look, delivering bass that's tight, accurate, hard-hitting, and way down low.

Read more

This enclosure comes without a speaker — you install your favorite 12" Type 1 subwoofer. For best results, Bass Slammer strongly recommends using a speaker designed for an enclosure with a volume of between 0.5 and 1.0 cubic feet. The enclosure mounts under the rear side seat on the driver's side of the 2004-up Ford F-150 Crew Cab truck. 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 unloaded subwoofer enclosure
  • Type 1 enclosure for 12" subwoofer
  • mounts under the rear side seat on the driver's side of the 2004-up Ford F-150 Crew Cab truck
  • high-density polyethylene construction
  • warranty: 60 days
  • 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 12
Cutout Diameter or Length (inches) 11 1/16
Maximum Speaker Depth (inches) 5-9/16
Box Volume (cubic feet) 0.89
Tuning Frequency N/A
Height (inches) 8-1/16
Width (inches) 34-7/16
Depth (inches) 14-3/8
Second Depth (inches) 12-7/8
Wood Thickness (inches) 0
Speaker Wire Connectors Spring posts
Box Color Black
Box Finish Poly resin
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

  • Black unloaded single 12" subwoofer enclosure with polyester fiber batting and speaker wire attached inside cabinet
  • 4 Self-adhesive foam gasket strips
  • Two 2" self-tapping screws
  • Eight 0.75" self-tapping screws
  • 2 Flat washers
  • Instruction sheet

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.



Compatibility: This enclosure is designed to mount under the rear seat on the driver's side with the enclosure firing down of a 2004 and up Ford F150 Crew Cab Pickup.

Unloaded: This enclosure comes without speakers, allowing you to install one compatible 12" subwoofer of your choice.

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

Sealed: The enclosure is sealed and has an internal volume of 0.89 cubic feet.

Spring Posts: The enclosure has one set of silver-plated, spring-loaded posts to accommodate bare speaker wire or pin connectors.


Mounting Location: This enclosure mounts under the rear seat on the driver's side with the enclosure firing down of a 2004 and up Ford F150 Crew Cab Pickup.

Note: The provided dimensions are taken at the widest points of the enclosure. Keep in mind that these enclosures are custom made to fit in a particular vehicle, so the enclosure will fit properly in only one specific location.

Tools Required:You will need the following tools to install this enclosure:

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


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 Vehicle-specific Unloaded Enclosure — Single 12" Reviews

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3 out of 5

Fit's great

Written By gary, Orlando Fl on Wednesday, July 23, 2008
My wife bought me an entire system for christmas for my F-150 super cab, DVD player vm9311ts two set's of RF p1683c's for my door's one AP740 and one AP1000 set mono with this MTX loaded box. It sounds great but the bass is not as hard hitting as I would like, because since it is a plastic box it does flex. If you want good bass then get this box with a MTX4500 12 in sub. It's a great sound but don't think you can pound the ground
20 out of 26 people found this helpful
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For a more in-depth review and enhanced detailed information on the MTX Vehicle-specific Unloaded Enclosure — Single 12", please visit the Crutchfield website product page (/ISEO-rccbcspd/p_236F150CBU/MTX-Vehicle-specific-Unloaded-Enclosure-Single-12-Black.html ).