MTX ThunderForm Unloaded Enclosure

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

  • MTX ThunderForm Unloaded Enclosure

    Tan (sub not included)

  • MTX ThunderForm Unloaded Enclosure

  • MTX ThunderForm Unloaded Enclosure

  • MTX ThunderForm Unloaded Enclosure


Our take on the MTX ThunderForm Unloaded Enclosure

by Steven Johnson

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 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.


  • 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

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) 4-1/2
Box Volume (cubic feet) 0.6
Tuning Frequency N/A
Height (inches) 28-1/2
Width (inches) 12-1/2
Depth (inches) 9
Second Depth (inches) 9
Wood Thickness (inches) 0
Speaker Wire Connectors Spring posts
Box Color Tan
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
  • 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 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.
Review this product
Great Gear Giveaway rewards card

Submit a review and then enter to win a $500 rewards card

MTX ThunderForm Unloaded Enclosure Reviews

Average Customer Review:

2 people say:

Review this product:

Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information.

Your email won't be visible. Please use the email address that is associated with your order.
(e.g., JohnD) Your review will be signed using the display name and location
(e.g., Charlottesville, VA)

Click on a star to rate the overall product on a scale of 1-5
1500 characters left
Attach a YouTube Review
Crutchfield Video Review Guidelines
  • Only submit videos that you made or are authorized to use.
  • Do not submit videos that contain music, video or visuals that are copyrighted and belong to someone else.
  • Please see our Review Guidelines for more information.
500 characters left
500 characters left
Filter by rating:
5 out of 5


Written By isaac, Broken Arrow, OK on Friday, August 04, 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!!!

11 out of 12 people found this helpful
Was this review helpful?    Yes | No
3 out of 5

new kick

Written By kyle, sparta, MO on Sunday, 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.
42 out of 55 people found this helpful
Was this review helpful?    Yes | No

Add accessories for the MTX ThunderForm Unloaded Enclosure

Don't skimp on the wire you will need to run from your new subwoofer enclosure to your amplifier. See all categories & accessories

T-Spec 16-gauge Speaker Wire Black/white jacket — priced per foot
13 people say
Your Price: $0.69
Add to Cart
T-Spec 12-gauge Speaker Wire Black/white jacket — priced per foot
29 people say
Your Price: $1.99
Add to Cart
Stinger PRO Series 16-gauge Speaker Wire Black jacket — priced per foot
49 people say
Your Price: $0.39
Add to Cart

Why choose SquareTrade?

The #1-Rated Protection Plan

Thousands of people have reviewed SquareTrade Protection Plans — and made us #1.

5-Day Service Guarantee & Free Shipping

We'll repair or replace your item in five business days or less after we've received it, or your plan is free. And, as always, we pay for all shipping.

Protection from Normal, Everyday Use

Repairing your average mechanical or electrical failure can cost as much as buying a new device. With SquareTrade, you're covered — including parts and labor.

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_236RM101UT/MTX-ThunderForm-Unloaded-Enclosure-Tan.html ).