There's a Thunderstorm in the forecast, and it's headed for the wasted space in your vehicle. ThunderForms preserve all the legroom in pickup trucks and all the cargo space in SUVs. Each ThunderForm is an acoustically-designed, non-resonant, airtight enclosure, with the correct internal volume to yield optimum bass response from its subwoofer.

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So what makes ThunderForms different than a standard sub box? MTX engineers design each ThunderForm enclosure for optimum performance in your specific vehicle's acoustic space. Using state-of-the-art rotational molding techniques, and exotic high-density polyethylene, MTX creates a sculpted masterpiece of a sub box, beautifully finished to blend with your interior. And they sound as good as they look, delivering bass that's tight, accurate, hard-hitting, and way down low.

This Amplified ThunderForm comes ready to install behind the driver's seat of your 1998-up Ford Ranger and Mazda B Series regular cab truck, with a rugged 10" subwoofer and a super-efficient 200-watt amplifier already built in — so you don't have to find a spot to mount a separate amp. There is no loss of leg room and the passenger side tool tray with factory jack kit is not disturbed. The factory storage tray must be removed for the installation. Speaker- and line-level audio inputs means you can integrate them into any system. They also have simple connections for 12-volt power, ground, and signal wires. 1-year limited warranty.

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Product highlights:

custom-fit powered subwoofer
enclosure fits behind driver's seat
one Terminator 10" subwoofer
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: 2 years
MFR # RMP101AC-TN

What's in the box:

MTX Amplified ThunderForms owner's manual

Amplified ThunderForm enclosure loaded with one 10" Terminator subwoofer
Two 15 amp fuses (1 in-line/1 installed in the ThunderForm)
Wiring harness (20' power lead/3' ground lead and 3' remote turn-on lead)
Electronic Bass Control (wired remote) with attached cable
Mounting hardware
Installation instructions

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Researched by Crutchfield's Pat M.

The MTX Amplified ThunderForms replaces these items:

MTX Amplified ThunderForms

Product Research

Features

Vehicle-Specific Custom Enclosure: This MTX ThunderForm enclosure is specifically designed to fit select 1998-2011 Ford Ranger regular 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 behind the driver's seat. 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 Subwoofer: This enclosure comes loaded with one 10" MTX Terminator subwoofer. The woofer has an unusual impedance, specifically designed for the built-in 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 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: