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
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 output.
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 speakers 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
Recommended Ported Box Volume: Polk recommends a ported
enclosure made out of 3/4" MDF with an ideal internal volume of 1.58 cu/ft
using a slot port measuring 13.5" wide x 1.5" tall x 18.5" deep.
Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.