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.
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.
- charcoal custom-fit subwoofer enclosure
- mounts under back seat
- high-density polyethylene resin enclosure
- two 10" Terminator 4-ohm subwoofers
- power range: 100-400 watts RMS (800 watts peak power)
- frequency range: 29-160 Hz
- sensitivity: 85 dB
- dimensions: 55-1/8"W x 7"H x 10-3/4"D
- warranty: 2 years
- Our 60-day money-back guarantee
- MFR # F250X00C20-TN
What's in the box:
- ThunderForm enclosure loaded with two 10" Terminator subwoofers
- Mounting hardware
- Installation instructions
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More details on the MTX ThunderForms
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.
The MTX ThunderForms replaces these items
2000-up Ford F-250/F-350 SuperCab
- Rugged charcoal enclosure installs under the rear seat
- two 8-ohm 10" Thunder 4500 carbon-filled polypropylene woofers
- single 4-ohm terminal
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