MTX Amplified ThunderForms

Custom-fit powered subwoofer for 2004-up Chevy Colorado or GMC Canyon Crew Cab (Charcoal)

Item #: 236COLCAFP

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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.

Built-in 200-watt amp and 10" sub
This amplified ThunderForm comes equipped with a cool-running 200-watt amp that's custom designed to provide optimal power to its 10" FPR subwoofer without straining your vehicle's electrical system. MTX's Electronic Bass Control (EBC) lets you adjust the bass level from the driver's seat. A variety of inputs allow easy integration into your vehicle's sound system, and the included 20' power harness simplifies supplying power to the amp.

Made for your vehicle
This enclosure installs under the rear passenger seat in your 2004-up Chevrolet Colorado or GMC Canyon Crew Cab, extending out in front of the cup holder. 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 powered subwoofer
  • enclosure fits under the rear seat and in front of the cup holder
  • one down-firing 10" FPR subwoofer
  • built-in 200-watt RMS Class-D amplifier
  • high-density polyethylene enclosure
  • variable low-pass filter (50-150 Hz at 12 dB per octave)
  • preamp- and speaker-level inputs
  • 20' power harness included
  • warranty: 5 years (free repair or replacement for 2 years, prorated replacement for years 3 through 5)
  • Our 60-day money-back guarantee

Vehicle-specific enclosures with subs? Say what?

Instead of the usual sub in a box, the manufacturer creates a molded enclosure that fits perfectly into a convenient spot in your specific vehicle, housing a high-quality sub. Some enclosures even include a built-in amp, for the ultimate in stealth bass. The advantages? You don't lose much space (if any), your sub is perfectly matched to its enclosure, and your enclosure has a factory look that won't tell potential thieves you have an awesome sound system. Doesn't get better than that.

Hands-on research

What's in the box?

Download owner's manual

  • Charcoal amplified ThunderForm enclosure loaded with one 10" FPR subwoofer and a 20A ATC fuse
  • Wiring harness (20' power lead/3' ground lead and 3' remote turn-on lead)
  • 1 Fuse holder with attached wire loop
  • One 20A ATC fuse
  • One 0.202" crimp-on ring
  • One 0.414" crimp-on ring
  • 1 Yellow butt connector
  • Two 5' RCA high-level input wires (each wire has an RCA connector on one end and tinned wire on the other end)
  • External bass control with attached 17.5' cable (has a right-angle minijack stereo connector)
  • 1 Plastic knob (for the external bass control)
  • 1 Metal mounting bracket
  • Two 3/4" self-tapping screws
  • 1 Medium flat washer
  • 2 Small flat washers
  • 2 Lock washers
  • 1 Hex nut
  • One 3-3/4" cable tie
  • 1 External bass control sticker
  • 2 Large flat washers
  • 2 Large self-tapping screws
  • Manual

Product Research

Features
Warranty

Features

Molded Enclosure: The molded, high-density polyethylene resin enclosure resists flexing and dampens resonance.

FPR Woofer: This enclosure comes loaded with one 10" FPR woofer. The woofer has an unusual impedance, specifically designed with the amp, and cannot be replaced with a standard MTX model.

Class D Amplifier: The enclosure contains a built-in 200-watt Class D (digital) amplifier that allows RCA or speaker-level input. The amplifier is highly efficient and designed specifically for use with the subwoofer in the enclosure.

Built-in Low-pass Filter: The low-pass filter frequency can be varied from 50 to 150 Hz for a seamless transition between the output of this unit and that of the other speakers in the vehicle.

Auto Turn-On Feature: When the speaker level inputs are used, the system will automatically turn on and off with the radio.

Note: The auto turn-on feature does not operate when the preamp level inputs are used, unless the remote turn-on lead is connected.

External Bass Control: The external bass control allows you to adjust the bass level from anywhere in the vehicle.

Warranty

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.

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.

MTX Amplified ThunderForms Reviews

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MTX Thunderform for Cevy Colorado

Written By Sam T., Renton WA on Thursday, December 11, 2014

Crutchfield Customer Review (What's this?)

Crisp sound, easy install and the bass thumps!

Pros: Crisp sound and easy install. The product came fast in the mail! Very happy

Cons: None that I can come up with

Thunderform

Written By Gregory, Crimora, Va on Friday, September 05, 2014

Crutchfield Customer Review (What's this?)

I upgraded the factory system to a sony dvd with polk db's all around in my 05 colorado Crew Cab. Components in the front and 2 ways in the rear. Still little to no bass. System was a lot louder though. you could actually hear it with the windows down now. Then I added the amplified Thunderform under the rear seat. It is a 1000% improvement. Good low bass, and rather intense. You may not win any crank it up contest but its well worth the money. Install was easy too.

Pros: Sounds Great, Well made, Plenty loud for my needs, Install was easy even though I had to pull out the rear seat to do so.

Cons: Plastic power connector is fairly cheesy, Provided rca cables are very cheap. I opted to use a set of rockford cables I already had. The big thing for me was that the color did not quite match. I have dark pewter and the charcoal of the tform Did not match by a few shades but still ok. This is the only reason i did not give it 5 stars.

Get everything you’ll need to enjoy your new MTX Amplified ThunderForms

You'll need speaker wire to get the signal from your amp to your sub.
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