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MTX Amplified ThunderForms

Custom-fit powered subwoofer for 1997-2006 Jeep Wranglers (Tan)

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Our take on the MTX Amplified ThunderForms

by John Pollard
MTX

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.

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 subwoofers modified especially for amplified Thunderforms, with a specially-designed amp that puts out 200 watts of power. It fits behind the rear seat of your 1997-06 Jeep Wrangler. The enclosure is seamless and airtight, with the correct internal volume to yield optimum bass response from the subwoofers. Hardware is included.

See more info on this item

Highlights:

  • custom-fit powered subwoofer
  • enclosure fits behind rear seats
  • two Terminator 10" subwoofers
  • built-in 200-watt RMS amplifier
  • high-density polyethylene enclosure
  • variable low-pass filter (50-150 Hz at 12 dB per octave)
  • preamp- and speaker-level inputs
  • 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?)

Product Research
What's in the box?

Download owner's manual

  • Amplified ThunderForm enclosure loaded with two 10" Terminator subwoofers
  • Two 20 amp fuses (1 in-line/1 installed in the ThunderForm)
  • Wiring harness (20' power lead/3' ground lead and 3' remote turn-on lead)
  • Speaker-level to RCA harness
  • Electronic Bass Control (wired remote) with attached cable
  • Mounting 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.

Features
Warranty

Features

Vehicle-Specific Custom Enclosure: This MTX ThunderForm enclosure is specifically designed to fit select 1997-2006 Jeep Wranglers. 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 behind the rear seat. The rear seat will still fold/flip. 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.

10" Terminator Subwoofers: This enclosure comes loaded with two 10" MTX Terminator subwoofers. The woofers have an unusual impedance, specifically designed for the built-in amp, and cannot be replaced with standard MTX models.

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 subwoofers in the enclosure.

Electronic Bass Control (EBC): The EBC is a wired remote and allows you to adjust the bass level from anywhere in the vehicle. Installing the EBC is optional.

Low-pass Crossover: The low-pass crossover point is adjustable from 50 to 150 Hz for a seamless transition between the output of this unit and that of the other speakers in the vehicle.

Controls:

  • Gain Control: rotary control; set the gain of the amplifier is match the input
  • Crossover Control: rotary control; adjust the crossover from 50 to 150 Hz

Auto Turn-On Feature: When 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 preamp level inputs are used, connecting the remote turn-on lead is required.

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

  • Powered Screwdriver
  • Phillips Head Screwdriver
  • 6" Bit Extension
  • 10mm Wrench
  • Wire Ties
  • Utility Knife
  • Right Angle Skewdriver

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.
 
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MTX Amplified ThunderForms Reviews

Average Customer Review:

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1 out of 5

Junk

Written By Anonymous, Ada ok on Saturday, August 23, 2014
Crutchfield Customer Review (What's this?)
 
Waste of money. Terrible quality and sound.
Pros:
Fits
Cons:
Everything else
Was this review helpful?    Yes | No
 
2 out of 5

Two days of bliss

Written By Gray, Ocean Springs, MS on Thursday, May 01, 2014
Crutchfield Customer Review (What's this?)
 
Easy install kept this from being a 1 rating. Beyond that, I can only say that I expected more from MTX. At first the speakers sounded great. This stopped on the second day. All function stopped. I thought that maybe the speakers had a loose wire. This was not the case. The speaker is filled with one layer of matting. The internal components are held in place using adhesive that fails to hold. Internal components ended up wrapped inside the matting. The shoddy application of adhesive allowed the internal components to bounce around freely inside the box.
Pros:
Easy install
Cons:
Shoddy manufacturing
Was this review helpful?    Yes | No
 
5 out of 5

MTX Amplified ThunderForms

Written By John, Carrollton, KY on Thursday, September 12, 2013
Crutchfield Customer Review (What's this?)
 
Very easy to install. Adds a very good bass note even with the top down.
Pros:
Easy install, great sound
Cons:
As expected, cargo room goes away.
Was this review helpful?    Yes | No
 

2 questions already asked

Would these speakers be weatherproof at all? [ Keith  Apr 15, 2014 ]
1 answer
  • Keith, as far as I know they aren't weatherproof. If you have a soft top it covers it pretty well when its down. I've had the top down in light rain and never had the speakers get wet. Hope this helps. [ JOHN H   Apr 15, 2014 ]
Is there any drilling required, or does install using predrilled holes in the body? [ Matt  Jan 18, 2014 ]
2 answers
  • Hi Matt, The unit you have will fit between the seat and the rear door. I bought the same one for my Jeep and it fits perfectly. Technically, since the seat back angles back to the tailgate you can probably drive all you want without having to bolt this down. But if you have no carpet in back, or you want to make sure it cannot move, then you can attach it to the floor. There are many options for this. Since there is about 2 inches or so between the floor base and the rear gas tank, you can drill through the floor (carefully) and use large, but short, sheet metal screws to anchor the unit. you can also use Pop Rivets - the big ones if you have them. there are also Blind Nuts that you can install. You can find them at Fastenol or many Jeep shops. They basically are placed in a hole and you expand the base by screwing in a bolt with a nut and washer on it so that is cases the nut to expand in the hole. This is a great unit. I would install it. But if you have carpet, and do not plan on flipping your keep over, then placing it between the seat and rear door will work. it is a very good fit and works great. hope that helps - [ TROY   Jan 21, 2014 ]
  • We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question. [ Jeff Staff  Jan 20, 2014 ]

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For a more in-depth review and enhanced detailed information on the MTX Amplified ThunderForms, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_236TJ97TN/MTX-Amplified-ThunderForms-Tan.html ).

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