NBR 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 durability.
Cone Cosmetics and Materials:
The woofer cone is made of injection-molded silver-colored poly
with 8 stiffening ribs for improved cone stiffness and higher mechanical power
handling. 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.
Oversized Magnet Structure: This
woofer has an oversized magnet structure, made with a 28 oz. Strontium Ferrite
Coil: A 2" four-layer voice coil is used for higher power handling.
Asymmetrical Linear Drive:
system improves linearity and permits high output with low distortion.
Extended Vented Pole Piece:
The extended vented pole piece provides a more symmetrical magnetic field.
Enclosure Compatibility: This
woofer can provide extended bass in sealed, vented
and bandpass enclosures (see below for more information on enclosures).
Sealed Box Volume: The sealed box
sizes recommended by MTX range from 0.5 cu/ft to 1.0 cu/ft. The sealed
enclosure MTX highlights on their spec sheet is a 0.75 cu/ft enclosure, so
this is the enclosure recommended by Crutchfield.
Vented Box Volume: The vented box sizes recommended by
MTX range from 1.0 cu/ft to 2.0 cu/ft. The vented enclosure MTX
highlights on the woofer specification sheet is a 1.5 cu/ft enclosure, so
this is the enclosure recommended by Crutchfield. One 3" diameter x
11" long port should be used with a 1.5 cu/ft enclosure; a 1.5 cu/ft
enclosure with a 3"x 11" port has a tuning frequency of 32 Hz.
Single Reflex Bandpass Volume:
The bandpass box sizes recommended by MTX range from
to 1.73 cu/ft. MTX highlights two bandpass enclosures on the woofer
specification sheet. One highlighted enclosure has an "S" value
of 0.6, and the other highlighted enclosure has an "S" value of
0.7. The highlighted bandpass enclosure with an
"S" value of 0.6 is a 1.13 cu/ft enclosure, with a sealed chamber
volume of 0.38 cu/ft, a vented chamber volume of 0.62 cu/ft and a single 4" diameter x
9.5" long port. The enclosure with an "S"
value of 0.7 is a 1.42 cu/ft enclosure, with a sealed chamber volume of 0.46
cu/ft, a vented chamber volume of 0.85 cu/ft and a single 4" diameter x 7.5" long port.
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
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 verify what’s in the box, 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.