Klippel Optimized: Using a state-of-the-art Klippel Distortion
Analyzer, Polk engineers were able to optimize the woofer's motor structure,
voice coil alignment and suspension for the best possible performance, even at
extreme listening levels.
Polymer Woofer Cone with Butyl Rubber Surrounds: The Polymer
Woofer Cones and Butyl Rubber Surrounds will not break down over time and will
survive the rigors of harsh automotive environments.
High Temperature Copper Voice Coil (50mm) and Polyamide Former: High
Temperature 50mm Copper Voice Coil and Polyamide Former withstand the most
rigorous use while maintaining extremely low distortion for bass punch and
Dual 4-ohm Voice Coils: This woofer features dual 4-ohm
voice coils that offer wiring flexibility. When the voice coils are wired in
parallel, the woofer presents a 2-ohm load. When wired in series, the woofer
presents an 8-ohm load.
Carbon Composite Basket: The woofer's carbon composite basket is
lightweight and will not flex during music audio peaks.
Nickel Plated Heavy Duty Input Terminals: Nickel plated heavy
duty input spring-post terminals accommodate speaker wire up to 8 AWG or twisted
pairs of 12 AWG.
Preconditioning Period: Mobile Monitor subwoofers will achieve
even greater performance once they are thoroughly broken in. To break in your new
MM subwoofer, play 20 to 30 hours of music at moderate levels.
Marine Certified Woofer: Polk MM Series woofers are built to
withstand exposure to moisture and UV rays, so they work well in boats and cars.
They also include stainless mounting hardware for corrosion and rust resistance.
Recommended Sealed Box Volume: Polk recommends mounting this
woofer in a sealed enclosure made out of 3/4" MDF with an internal volume of
0.66 cubic feet.
Recommended Ported Box Volume: Polk recommends a ported
enclosure made out of 3/4" MDF with an ideal internal volume of 1.0 cubic feet
using a slot port measuring 13.5" wide x 1" tall x 20" deep.
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