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MTX ThunderForms

Custom-fit subwoofer for 2000-14 Ford F-250/F-350 SuperCab (Black)

Item # 236F250BTN

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

Find what Fits your vehicle

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

California customers:
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Item # 236F250BTN

$479.95

Free custom vehicle instructions

Installation help for your car, from our experts.

60-day price protection

We’ll reimburse you if the price drops.

60-day returns

If you don't love it, send it back.

About the MTX ThunderForms

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 molded MTX ThunderForm comes loaded with two premium-quality 10" Terminator speakers. It mounts under the rear seat of select 2000-2014 Ford F-250 and F-350 SuperCab pickups. Hardware is included.

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Product highlights:

  • black custom-fit subwoofer enclosure
  • mounts under back seat
  • high-density polyethylene resin enclosure
  • two 10" Terminator 8-ohm subwoofers (4-ohm total impedance)
  • frequency response: 29-160 Hz
  • power range: 100-400 watts RMS (800 watts peak power)
  • sensitivity: 85 dB
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # F250X00BK20-TN

What's in the box:

  • ThunderForm enclosure loaded with two 10" Terminator subwoofers
  • Mounting hardware
  • Installation instructions

Customer reviews

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MTX ThunderForms reviews

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More details on the MTX ThunderForms

Pat M.
The MTX ThunderForms replaces these items:

Product Research

Features

Vehicle-Specific Custom Enclosure: This MTX ThunderForm enclosure is specifically designed to fit select 2000-2014 Ford F-250 Super Cab pickups.

Enclosure: The ThunderForm enclosure is made of molded high-density polyethylene resin, which dampens resonance and is rigid enough to resist flexing. It is an acoustic suspension (sealed) chamber.

Mounting Location: This enclosure is designed to mount under the rear seat. The jack stays in the factory location; the jack tools are relocated to the center compartment under the enclosure. 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 this particular vehicle, so the enclosure will fit properly in only one specific location.

Woofers: The ThunderForm enclosure is loaded with two 8Ω, 10" MTX Terminator subwoofers. The subwoofers are wired in parallel to a single terminal, presenting a 4Ω load to your amplifier.

Tools Required: The manual provides this list of required tools:

  • Powered Screwdriver
  • #2 Phillips Head Bit
  • 6" Bit Extension
  • 5/16" Wrench
  • Wire Cutters
Note: The manual provided is for both the amplified and non-amplified versions of this ThunderForm. Some of the tools may not be needed for this non-amplified ThunderForm.

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Customer Q&A

15 questions already asked

Q
If I buy an amplifier, am I able to put it inside box myself?
[ Brady  Apr 04, 2022 ]
1 answer
A
An amp for the passive model would fit external to this subwoofer enclosure.
[ Jenny  Apr 07, 2022 ]  Staff
Q
Is the bass crazy because I'm trying to thump lol?
[ Camden  Mar 31, 2022 ]
3 answers
A
Correction - ordered 4 weeks ago and still haven't received anything. It's been weeks since a update and I had to ask before I heard anything.
[ Bryant  Apr 01, 2022 ]
A
I ordered this about 6 weeks ago and still waiting.... so as of yet no thump. If you are looking to pay for something and receive it promptly I would suggest ordering something else.
[ Bryant  Apr 01, 2022 ]
A
They're on backorder without a date for when they'll be in
[ LACEY MARIE  Apr 01, 2022 ]
Q
Itâ??s this the only color on the box?
[ Javier  Nov 18, 2021 ]
1 answer
A
I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. These ship directly from MTX so there may be an option to order an alternate color.
[ Kenny  Nov 20, 2021 ]  Staff
Q
Would this fit in a 2001 Ford Ranger xlt?
[ Jordan  Aug 12, 2021 ]
1 answer
A
For additional details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle.
[ Kenny  Aug 14, 2021 ]  Staff
Q
Is this a powered setup?
[ Joker  Jun 13, 2021 ]
1 answer
A
This is not a powered subwoofer and needs an amp to run. We typically do have a powered version of the thunderform and recommend contacting an advisor by calling 1-800-324-9695 to check if we have one for your pickup
[ Paul  Jun 26, 2021 ]  Staff
Q
What head unit , speakers, and amp can you recommend to go along with this?
[ Todd  Feb 07, 2021 ]
1 answer
A
It has an amp built into the unit. Just got this today. All it needs is power, remote turn on and connection to your headunit.
[ Eliteman76  Apr 09, 2021 ]
Q
Does this box fit 2008 Ford F350 KingRanch?
[ Halli  Oct 26, 2020 ]
1 answer
A
Unfortunately it does not fit. We don't actually carry any custom fit subs or enclosures for this truck at this time. Give us a call at 1-800-324-9695 for more options.
[ Allison  Nov 25, 2020 ]  Staff
Q
whats the mounting depth on the subwoofers?
[ ethan  Apr 25, 2018 ]
1 answer
A
The 10" MTX Terminator subs have a mounting depth of 4-11/16". Hope that helps! : )
[ Larry  May 04, 2018 ]  Staff
Q
Could I purchase just the enclosure itself without the subwoofers? If so how much would the price be?
[ Bobby  Aug 23, 2016 ]
1 answer
A
Thanks for your question. Only the loaded version is available. MTX matches the subs to the internal volume to yield optimum bass response.
[ Kenny  Aug 23, 2016 ]  Staff
Q
Is there any room to mount 12 inch subs in this box? or is there something Similar too this box that would fit the f250 super cab with suicide back doors?
[ Stump  Jan 04, 2020 ]
1 answer
A
That MTX Thunderform enclosure comes pre-loaded with 10" woofer.s You wouldn't be able to fit 12" without making serious modifications, and even then, there is likely not enough airspace for bigger subs. What year is your F250? We can help explore other options. You can connect with one of our friendly product advisors for live help here: https://www.crutchfield.com/I-rET1c290/S-SUliZgSTXG7/support/ContactUs.aspx
[ Cosmo  Feb 11, 2020 ]  Staff
Q
What size amp would I need to get best performance from this set up?
[ Marvin  Apr 20, 2017 ]
1 answer
A
Thanks for your question. For information on selecting the best amp/sub combo I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system.
[ Kenny  Apr 22, 2017 ]  Staff
Q
Will this fit a 2002 f250 lariat extended cab?
[ Deuce  Nov 28, 2020 ]
1 answer
A
This will work win the 2002 F250 super cab pickups but not the crew cab pickups
[ Paul  Dec 09, 2020 ]  Staff
Q
Is it possible to make this enclosure fit a Crew cab?
[ Peter  Dec 22, 2018 ]
1 answer
A
Hi Peter, I won't tell you anything is impossible but that MTX Thunderform enclosure is specifically designed to fit 2000-2010 F250 SuperCab trucks. It's possible you could make it fit in a crew cab but it would certainly require custom modifications and work - kind of nullifying the advantage of buying a custom enclosure. What is the exact year make and model of your truck? We may have some other options that are a better fit. You can reach out to one of our Product Advisors to get some personal recommendations.: https://bit.ly/2QNxGQB Let me know if you have any other questions or concerns. --Cosmo
[ Cosmo  Dec 31, 2018 ]  Staff
Q
Does it come with the wires to wire to the vehicle and to a amplifier?
[ Clint H  Mar 02, 2017 ]
1 answer
A
The only wires that connect to this Thunderform is speaker wire. The amp will need power wiring and signal input wires to install it. None of this wiring is included in the packaging with this sub box. I recommend calling an advisor on 1-800-324-9695 for a personal recommendation on all this needed gear. My Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=101
[ Paul  Mar 12, 2017 ]  Staff
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