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 open the box,
verify contents, 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.
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 surround will not break down over time and will
survive the rigors of harsh automotive environments.
Voice Coil and Former: The high temperature 50mm copper voice
coil and polyamide former withstand the most rigorous use while maintaining extremely
low distortion for bass punch and output.
Dual 4-ohm Voice Coils: This woofer features dual 4-ohm voice
coils, offering 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
Carbon Composite Basket: The woofer's carbon composite basket is
lightweight and will not flex during music audio peaks.
Input Terminals: The nickel plated heavy duty input spring-post
terminals accommodate pin connectors, single or dual banana plugs, or bare speaker
wire up to 10 AWG.
Preconditioning Period: Mobile Monitor subwoofers will achieve
optimum 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.
Sealed Box Volume: Polk recommends mounting this woofer in a
sealed enclosure made of 3/4" MDF with an internal volume of 1.5 cubic feet.
Ported Box Volume: Polk recommends a ported enclosure made of
3/4" MDF with an internal volume of 2.5 cubic feet using a slot port measuring
18.5" wide x 1.25" tall x 20" deep.