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.
Cone Cosmetics and Materials:
The woofer cone is made of Mica-filled polypropylene with an aluminum finish
with 12 stiffening ribs for improved cone stiffness and higher mechanical power
handling; the ribs increase cone durability and performance. Concentric rings
are molded into the cone and dust cap surfaces to give them a machined
appearance. "MTX Audio" is embossed on the poly dust cap.
12-leg Die Cast Aluminum Basket: The
basket was built with the strength and stiffness required to handle the demands
of enormous bass without flex or distortion.
Oversized Magnet Structure:
This woofer has an oversized magnet structure, made with a 102 oz. Strontium
NBR Rubber Surround: The woofer
is made with a one-piece NBR (Nitrile Butadiene Rubber) surround and gasket
combination. When bottom-mounting the woofer, the one-piece surround and gasket
make an air-tight seal, to prevent any loss of performance due to air leaks
around the woofer. When the woofer is top-mounted, the one-piece surround and
gasket combination enhances the overall cosmetic appearance of the woofer. NBR
has the added benefit of being resistant to ozone and UV rays for extreme
Computer Optimized Progressive
Roll Spider (COPR): A "five roll" spider design is used
to maximize the linear region of the speaker's movement.
Eight-layer Voice Coil: A
2.5" eight-layer voice coil is used for higher power handling.
Spider Plateau Venting: Small
vents are located around the base of the frame to prevent hot air from being
trapped between the spider and the back plate. The vents help cool the voice
coil to increase power handling and reliability.
Asymmetrical Linear Drive: This
system improves linearity and permits high output with low distortion.
Extended Pole Piece: The
extended pole piece provides a more symmetrical magnetic field.
Spring Post Inputs: The inputs
are spring post connectors that will accept bare wire, tinned wire or wire
terminated with pin connectors.
Enclosure Compatibility: This
woofer can provide extended bass in sealed, vented and bandpass enclosures (see
below for more information on enclosures).
Recommended Sealed Box
Volume: The sealed box sizes recommended by MTX range from 1.25 cu/ft to
2.25 cu/ft. The sealed enclosure MTX highlights on their spec sheet is a 1.25
Vented Box Volume: The
vented box sizes recommended by MTX range from 2.0 cu/ft to 4.0 cu/ft. The
vented enclosure MTX highlights on the woofer specification sheet is a 2.5 cu/ft
enclosure with a 4" diameter x 10" long port having a tuning frequency
of 34 Hz.
Single Reflex Bandpass Volume:
The bandpass box sizes recommended by MTX range from 1.37 cu/ft to 2.42
cu/ft. MTX highlights two bandpass enclosures on the woofer specification sheet.
One highlighted enclosure has an "S" value of 0.5 and the other
highlighted enclosure has an "S" value of 0.6. The highlighted
bandpass enclosure with an "S" value of 0.5 is a 1.59 cu/ft enclosure
with a sealed chamber volume of 0.58 cu/ft, a vented chamber volume of 0.68 cu/ft
and two 4" diameter x 12.75" long ports. The enclosure with an
"S" value of 0.6 is a 1.97 cu/ft enclosure with a sealed chamber
volume of 0.71 cu/ft, a vented chamber volume of 0.97 cu/ft and two 4"
diameter x 9.75" long ports.
Note: The bandpass
enclosure with the higher "S" value produces a more narrow bandwidth
with better transient response; the enclosure with the lower "S"
value produces a wider bandwidth at the expense of transient response.