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Features
Controls and Inputs
Features
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 outputs of
this unit and the other speakers in the vehicle.
Smart Engage Auto Turn-On: When the speaker level inputs are
used, the amplifier's Smart Engage circuitry will automatically turn the amp on
and off with the radio.
Note: The auto turn-on feature
does not operate when the preamp level inputs are
used. You must connect the remote turn-on lead.
External Bass Control: The External Bass Control (EBC) allows
you to adjust the bass level from anywhere in the vehicle. You can mount the EBC
knob under the dash to give you easy access to the bass control.
Amplifier Wiring: The ThunderForm includes a wiring harness
which includes a 20' 10-gauge power wire, a 3' 10-gauge ground wire, and a 3'
turn-on lead. One end of the harness has a 3-pin Molex connector, which plugs
directly into the amplifier.
Thunder4500 Woofer: This enclosure comes loaded with a special
12" low impedance version of the Thunder4500. This proprietary 0.35 ohm woofer
has a long excursion voice coil, and is specifically designed for the amplified
ThunderForms.
Note: Because the woofer has
an unusual impedance, specifically designed with
the amp, it cannot be replaced with a standard
MTX model.
Carbon-filled Polypropylene Cone: The woofer cone is made of
carbon-filled polypropylene. Carbon adds strength and heat resistance to
polypropylene; the result is reduced distortion and improved reliability. In
addition, the cone is also very resistant to environmental extremes. The woofer
uses a polyether foam surround.
Asymmetrical Linear Drive System (ALDS): The Asymmetrical
Linear Drive System consists of a flat, progressive spider that improves suspension
and an extended vented pole piece that smoothes out the cone's linear motion.
The result is high output and low distortion.
Spider Plateau Venting: Heat from the voice coil is vented
through metal-mesh covered vents that surround the back of the spider.
Voice Coil: The voice coil is wound on a high-temperature
former to promote high power handling.
Strontium Ferrite Magnet: The strontium ferrite magnet yields
a highly efficient speaker.
Molded Enclosure: The molded, high-density polyethylene resin
enclosure resists flexing and dampens resonance.
Controls and Inputs
Controls:
- Gain Control: rotary control
that allows you to set the gain of the amplifier
- Crossover Control: rotary
control that allows you to adjust the crossover
from 50 to 150 Hz
Inputs:
- Input: left and right RCA
jacks; these jacks allow speaker-level input when
the supplied RCA high-level input wires are
connected
- EBC: 3.5mm mini-jack for use
with supplied external bass control
- Harness: 3-pin Molex jack for
use with supplied wiring harness
- Fuse: installed 20A ATC
fuse
