Why Choose Crutchfield?
Great gear and expert advice
Our experts help you pick the ideal gear for your needs.Meet our advisors
Free tech support for the life of your gear.Read about our one-on-one expert help
You may return items that are complete and like new for any reason within 60 days.See the details of our return policy
Earn one point for every dollar you spend and use those points to save on future purchases.Get full details on Crutchfield Rewards
Deep discounts on car installation gear
Trusted since 1974
Our customers have trusted us with their business, and they’ve helped us win awards for our service.Check out our most recent awards
The manufacturer’s warranty always applies.See more details
MTX F150C04BK12-TN ThunderForm
Custom-fit enclosure with 4-ohm 12" Terminator subwoofer for select 2004-08 Ford F-150 SuperCrew and SuperCab models (Charcoal)
MTX F150C04BK12-TN ThunderForm - Bottom of ThunderForm with included 12" Terminator subwoofer (Charcoal)
Item # 236F150CCN | MFR # F150C04C12-TN
$449.99 Earn up to 450 Rewards points
Our take on the MTX F150C04BK12-TN ThunderForm by Crutchfield's Dave Delamere
Designed to fit
You love your Ford F-150 and you want to add some more bass to it. The problem is that you'd like to keep some room for your stuff, so you don't want a bulky box. MTX designed this ThunderForm enclosure to fit perfectly under the driver's side rear seat, so its stealthy profile conserves space while still delivering the bass you want. You'll have plenty of room for the things you need to haul, and the fiberglass construction also gives you some toughness just in case your stuff starts rolling around. You can keep your jack in the factory location, and you can still fold your rear seats up and down.
Designed to thump
MTX's custom enclosure installs under the rear seat on the driver's side, housing an efficient 4-ohm 12" Terminator subwoofer that handles up to 200 watts RMS. Combine it with an appropriate amp, and you'll get a solid low-end thump to your music, whether you're sticking with the factory audio or upgrading your system to aftermarket gear. This ThunderForm's sealed enclosure delivers tight, accurate bass response that complements a wide variety of music.
Please enter your vehicle information or call an Advisor at 1-888-955-6000 to find out if this ThunderForm is compatible with your vehicle.
What's in the Box:
- ThunderForm enclosure loaded with one 12" Terminator subwoofer
- Mounting hardware
- Installation instructions
- custom-fit subwoofer for 2004-08 Ford F-150 SuperCrew and SuperCab models
- durable fiberglass enclosure
- enclosure fits under driver side rear seat
- single 12" MTX Terminator 4-ohm subwoofer
- power range: 100-200 watts RMS
- warranty: 2 years
- Our 60-day money-back guarantee
Vehicle-Specific Custom Enclosure: This MTX ThunderForm enclosure is specifically designed to fit select 2004-2008 Ford crew cab and extended cab pickups. Please refer to the Crutchfield Car Selector to confirm fit for your vehicle.
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 on the driver's side. Note: The provided dimensions are taken at the widest points of the enclosure. Keep in mind that this enclosure is 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 one 4Ω, 12" MTX Terminator subwoofer.
Tools Required: The manual provides this list of required tools:
- Powered Screwdriver
- #2 Phillips Head Bit
- Wire Cutters
- 5/16" Wrench
- 10mm Wrench
- Terminal Crimper
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.
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 verify what’s in the box, 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.