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Features
Enclosure Compatibility
Power Handling Note
Features
Dual Voice Coils: For increased
system flexibility, the woofer has two 4 ohm voice coils. When the voice coils
are wired in parallel, the woofer presents a 2 ohm load. When the voice coils
are wired in series, the woofer presents a 8 ohm load. In addition, each coil
may be connected to a different amplifier channel and each channel will see a 4
ohm load.
Cast Basket: The dual voice
coil woofer uses a polished chrome aluminum cast basket. This ensures a perfect
alignment on each and every woofer. Unlike stamped baskets, the cast basket
cannot bend or tweak under normal play and wear. Rigidity is important when
trying to achieve strong bass and high SPL.
Carbon Composite: The woofer
features a carbon composite cone, which is very rigid, allowing for more linear
cone movement. The result is improved sound quality and accuracy, plus less
distortion.
Treated Foam Surround: The
treated foam surround is resistant to temperature variations and provides the
consistent support necessary for the linear motion of the speaker cone. In
addition, the inherent damping capabilities eliminate the transmission of sonic
disturbances between the cone and the frame of the speaker. This greatly
improves the clarity of the speaker's output.
Aluminum Voice Coil Former: The
voice coil former is black, anodized aluminum for highly efficient thermal
transfer. This allows winding high temperature copper wire in multiple layers
for improved efficiency. This allows improved power handling by effectively
dissipating heat.
Extended Pole Piece: The pole
piece has been extended to provide a more linear magnetic field for the
operation of the woofer. This lowers distortion and provides the woofer with
better low frequency response.
Vented Oversized Back Plate:
The back plate has been stepped deeper to allow the woofer more excursion
without bottoming out. Additionally, the back plate is vented with a radius
aerodynamic back vent, which efficiently and quickly circulates cool air around
the voice coil. This allows for more excursion and increased power handling.
4-layer Voice Coil: The dual
4-layer, edge wound 2.5" voice coil design allows for a variety of impedance
loads when using one or multiple subs.
Flat Spider: The speaker's
linear compliance is balanced through the use of a flat spider design. A flat
spider provides symmetrical control of the voice coil through its cone
excursion. Linear cone excursion reduces harmonic distortion for improved sound
quality. This allows for reduced mechanical distortion for better sound quality.
Crossover: Audiobahn recommends
using a 12 dB/octave active crossover between 80 Hz and 100 Hz.
Speaker Terminals: Each voice
coil has inputs for bare wire up to 8 gauge. The wire is held in place by
tightening Allen Head bolts using the included Allen wrench.
Crown:
The six-pronged crown protects the woofer from accidental damage while allowing
plenty of cone excursion. The measurements in the Crutchfield database are taken
without the crown. With the crown installed, the flange height increase to
0.497" and the mounting height increases to 1.907".
Enclosure Compatibility
Recommended Sealed Box
Volume: Audiobahn recommends a sealed enclosure with an internal volume
between 0.5 and 1.5 cubic feet. While no ideal volume is given, the manual
notes the larger enclosure will play a lower note, but will not handle as much
power.
Recommended Ported Box
Volume: Audiobahn recommends a ported enclosure with an internal volume
between 1.3 and 3.3 cubic feet. Three specific enclosures are listed in the
manual. The "Space Saver" design is 1.3 cubic feet and has one 3" diameter x
7" long port. The "Everyday Bass" design is 2.3 cubic feet and has one
4"
diameter x 7" long port. The "Ultimate SPL" design is 3.3 cubic feet and has
two 4" diameter x 11" long ports.
Power Handling Note
Power
Handling: The woofer has two 4 ohm voice coils, and each coil
can handle up to 350 watts RMS (700 watts total).
