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Aerospace Cone Material: The Alpine Type-X woofer uses new advanced aerospace
materials for the cone, known as Kevlar-Rohacell which provides outstanding
strength at a lighter weight. These lighter materials minimize moving mass for
greater output efficiency.
Santoprene Surround: The woofer
features a High Amplitude Multi Roll Surround made of injection molded Santoprene,
that allows for an incredible amount of linear excursion and greater SPL.
The Alpine Type-X sub is built with HAMR
engineering, Alpine's exclusive subwoofer solution for cooler operation, longer
life and tight accurate bass.
Dual 4-ohm Voice Coils: The
Alpine Type-X woofer features dual 6-layer voice coils which utilize 220°C high-temperature
wire with Inner/Outer Winding on a Twin-Wall aluminum former. Dual voice
coil woofers offer flexibility in wiring. When the voice coils are wired in
parallel with each other, the woofer presents a 2 ohm mono load. When the voice
coils are wired in series with each other, the woofer presents an 8 ohm mono
load. In addition, each coil may be connected to a different amplifier channel
and each channel will see a 4 ohm load.
Terminal Block: The speaker
terminals are all located on one side in a machined gold-plated terminal block
with 2.5mm Allen-head set screws (an Allen wrench is included). There are slots
provided for the supplied voice coil jumpers.
Jumpers: The woofer is equipped
with two gold-plated voice coil connection jumpers. These jumpers allow you to
wire the voice coils in parallel (for a 2-ohm load) or series (for an 8-ohm
Mirrored Progressive Nomex Spiders:
This subwoofer has twin mirrored progressive Nomex spiders for added
stability and mechanical durability. The custom progressive rolls gives the
woofer a longer, more linear stroke (over 23mm one way) with maximum centering
and restoring force. Special edge control design and Nomex construction provide
excellent tear resistance, strength and long-term reliability. The woofer has
reinforced layer tinsel speaker leads that are woven into the spiders for the
one-sided terminal layout.
Multi-Stage Ventilation System:
The Alpine Type-X woofer has a multi-stage ventilation system with the following
- Cone/Voice Coil Junction
Venting: The unique parabolic cone and voice coil attachment piece help
to pull cool air into the motor structure.
- Spider Plateau/Leg Vent
System: Two vertical slits are cut into each of the four "legs" of the
basket below the spider to allow cool air to flow in and heated air to flow
- Dual Flare Pole: Optimizes
airflow into the motor structure across the billet copper shorting sleeves
and thermal coupling heat dissipation plate to increase cooling.
Magnet: The woofer is equipped
with triple-stacked strontium magnets with an overall magnet weight of 130
Cast Aluminum Exo-Frame: The Type-X
woofer utilizes a custom, one-piece, cast aluminum Exo-Frame with perimeter
venting. The unique design
provides the ultimate in voice coil cooling, creating a one-way airflow, keeping
hot air from coming into contact with the voice coil. The frame also features an
integrated spider landing and heat transfer plate.
Rubber Concealing Ring:
The woofer includes a rubber concealing ring to cover the screw holes when top mounting
the woofer. The top-mounted concealing ring increases the woofer's top mounting
measurement to 1.3125".
Recommended Sealed Box Volume:
The sealed box sizes recommended by Alpine range from 0.65 cu/ft to 1.25 cu/ft.
with an ideal volume of 1.0 cu/ft.
Recommended Vented Box Volume:
The vented box sizes recommended by Alpine range from 1.0 cu/ft to 2.0 cu/ft.
with an ideal volume of 1.8 cu/ft. A slot vent, with the dimensions of 12" x 1"
x 24", is recommended.