Features
Enclosure Compatibility

Features

Cast Basket: The 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.

Poly Coated Cone: The cone material in the Natural Excursion subwoofers is spruce pulp paper. This provides a combination of weight and strength and allows high levels of output without cone failure. The cone is non-pressed and has a 2-layer poly coating which increases the cone rigidity and lowers distortion.

Convex Dust Cap: An inverted dust cap is used to increase cone rigidity and improve power handling by forcing more air through the voice coil. Smooth frequency response is an added benefit.

Treated Foam Surround: The 2" 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 (4-layer in this case) 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.

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.

Lug-Lock Speaker Terminals: There are two positive and two negative inputs for bare wire up to 8 gauge. The wire is held in place by tightening Allen Head bolts using the included Allen wrench. Using the second pair of terminals, additional speakers can easily be wired in parallel.

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 with the crown installed. With the crown removed, the flange height decreases to 0.343" and the mounting height decreases to 0.882".

Enclosure Compatibility

Recommended Sealed Box Volume: Audiobahn recommends a sealed enclosure with an internal volume between 0.5 and 1.25 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 a total internal volume between 0.75 and 2.5 cubic feet (including port and woofer displacement). Three specific enclosures are listed in the manual. The "Space Saver" design is 0.75 cubic feet and has one 2" diameter x 6.75" long port. The "Everyday Bass Performer" design is 1.5 cubic feet and has one 3" diameter x 8" long port. The "Ultimate SPL" design is 2.5 cubic feet and has one 4" diameter x 8" long port.