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MTX ThunderForm Unloaded Enclosure

Holds a single 10" sub — fits 1998-up Ford Ranger / Mazda B-Series Regular Cab (Tan)

Item #: 236RM101UT

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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.

This enclosure comes without a speaker — you install your favorite 10" Type 1 subwoofer. For best results, MTX strongly recommends using a speaker designed for an enclosure with a volume of between 0.5 and 1.0 cubic feet. The enclosure mounts behind the driver's seat of the 1998-up Ford Ranger or Mazda B-Series Regular Cab truck (factory storage tray on driver's side must be removed). It will work with 60/40 bench seats, sport bucket seats, or a bench seat.

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.

Product Highlights:

  • custom-fit tan subwoofer enclosure for 10" sub
  • mounts behind driver's seat in regular cab trucks (60/40 bench seats, sport bucket seat, or bench seat)
  • fiberglass construction
  • volume: 0.6 cubic foot (sealed)
  • dimensions: 28-1/2"H x 12-1/2"W x 9"D
  • mounting depth: 5"
  • warranty: 5 years (free repair or replacement for 2 years, prorated replacement for years 3 through 5)
  • Our 60-day money-back guarantee

MTX ThunderForm Unloaded Enclosure Reviews

Average Customer Review:

2 Reviews


Written by: isaac from Broken Arrow, OK on August 4, 2006

i installed one of these in my 02 ranger edge.. I however installed the thunder 8000 sub and ran the mtx 502 amp.. Great system for a reg cab.. Would definitely recommend this for reg cab owners...

Crutchfield might not have the lowest price but most of the time that lower price has no warranty!!!




new kick

Written by: kyle from sparta, MO on July 10, 2005

I bought the enclosure unloaded, I felt it was a little more money than I wanted to pay but I looked around.. a lot, and Crutchfield had the second best price but if I had gone with the lowest price I woUld of got gouged wih shipping. It fit real snug behind my seat. probably more than I would of liked but it isn't a problem. I found that you can drop your seat all the way back but it will be right on your sub. overall it was a good fit. the wires to connect the sub I have I think been a little longer just for comfort, you know give me a more to work with.(I had to replace one connector because my sub didn't match)
I removed my factory jack and mounted my amp to the back wall and ran all my wires around to come out right next to it so I gained space there. But the quick connects on the sub stick strait up behind my fold down armrest. so using the little bit of space their runs the risk of crimping your wires or other damage.



Hands-on research

What's in the box?

Download owner's manual

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

Product Research



Vehicle Compatibility: This Bass Slammer custom-fit enclosure is designed specifically to fit the 1998-2007 Ford Ranger and 1998-2006 Mazda B Series pickup trucks. Fits only regular cab trucks with 60/40 bench-seat and standard bench or bucket seats.

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

Mounting Location: The enclosure mounts behind the seat directly behind driver in the Ranger or Mazda B-Series regular cab trucks, with no loss of leg room. The factory storage tray on the driver side must be removed.

Enclosure Type: The sealed enclosure features fiberglass construction and fits one 10" woofer.

Tools For Installation:

  • Power drill
  • Phillips head screwdriver
  • Ratchet
  • 3/8" Drill bit
  • 5/16" Socket
  • 7/32" Socket


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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