Alpine Type-R Subwoofer: These redesigned, fourth-generation Alpine type-R subwoofers include
several enhanced features to achieve even cleaner, deeper bass extension,
faster, more accurate transients and even greater output capability than before.
Kevlar Reinforced Pulp Cone:
This Alpine Type-R subwoofer has a two-piece structural parabolic Kevlar reinforced pulp cone. Kevlar adds
strength and tear resistance to the woofer cone while maintaining the benefits
of a pulp cone design. There is also an oversized inverted dust cap of the same
material, which increases rigidity and virtually eliminates distortion at
extreme volume levels.
HAMRS: The woofer features a High Amplitude Multi Roll Surround (HAMRS), made of injection molded Santoprene,
that allows for an incredible amount of linear excursion and greater SPL. The
High-Amplitude Multi Roll Surround Design allows for extreme excursions without
sacrificing valuable cone area. FEA Optimized for linearity and made with
injection-molded Santoprene, the HAMR surround is a key part of the suspension
system that allows for extreme excursions with accurate, distortion-free control
FEA Optimized Spider with Reinforced Layer Spider Integration: An FEA
optimized Nomex progressive spider with reinforced layer spider integration
ensures reliable and consistent control of the tinsel-leads to eliminate any
possible mechanical noises or interference typical of many high-excursion
Radial Vented VC Heatsink and Airflow Management System: Alpine's
Patented Radial Vented VC Heatsink and Airflow Management System actively
manages voice coil temperatures by forcing air directly across the heatsink
system. This helps to minimize power compression and ensures reliable long
playing time by actively eliminating output-robbing heat away from the voice
coil. The new one-piece cast aluminum frame with integrated shorting sleeve uses
the entire frame as a heatsink, to allow for sustained power output and
handling, even in the most extreme of applications.
FEA Optimized Segmented Machined CRC Motor Structure: The new Type-R
subwoofer has over 20% more motor force than its predecessor delivering more
accurate, louder and cleaner bass with even more control, thanks to its new
ten-piece, segmented, double stacked magnet structure. The optimized machined
CRC motor structure also creates a symmetrical magnetic field while optimizing
flux density to greatly reduce distortion, while further improving power
handling and output.
Compound Radius Curve Pole Geometry: Alpine's Patented Compound Radius
Curve pole geometry ensure for an ultra symmetrical magnetic field, while
optimizing flux density to greatly reduce distortion, while further improving
power handling and output.
Oversized Voice Coil: The oversized (65mm), high-temperature
(180°C), 4-layer dual voice coil offers more
than 35% more surface area, allowing for increased power handling to 600W RMS /
Dual Voice Coils: For increased
system flexibility, the woofer has two 2-ohm voice coils. When the voice coils
are wired in parallel, the woofer presents a 1-ohm load.
When the voice coils are wired in series, the woofer presents an
4-ohm load. If each coil is connected to a different
amplifier channel, each channel will see a 2-ohm load.
Push Terminals: The push terminals are all located on one side of the woofer. The terminals will accept
bare wire up to 8 gauge, pin connectors, or banana plugs.
Jumpers: Included with the woofer
are two voice coil terminal jumpers. These jumpers allow you to easily wire the
voice coils in parallel (for a 1-ohm load) or series (for an 4-ohm load).
Sealed and Vented Enclosure Compatible: The Alpine Type-R
Subs have been completely redesigned to offer more installation flexibility and
application versatility (in either a sealed over vented enclosure) to build the
ideal sound system in your vehicle. These new designs offer a near 20% reduction
in mounting depth, while offering even greater output capability.
Recommended Sealed Box Volume:
The recommended sealed box sizes range from 0.65 cu/ft to 1.25 cu/ft. Within this
range, the ideal size is 1.0 cu/ft.
Recommended Vented Box Volume: The recommended vented box sizes range from
1.0 cu/ft to 2.0 cu/ft. Within this
range, the ideal size is 1.5 cu/ft. A slot port with the following dimensions
should be used: 12" (W) x 1.25" (H) x 22" (L).