Highlights:

• 8" Marine Single 4 ohm Mobile Monitor MM Series Subwoofer
• Power Handling:
  • Peak: 500 watts
  • RMS: 250 watts
• Impedance: Single 4 Ohm
• Polymer woofer cones
• Butyl rubber surround
• Heavy duty input terminals
• Carbon composite basket is lightweight and durable
• Klippel optimized components for the best possible performance
• 1-1/2" High temperature copper voice coil
• Frequency response: 26-200 Hz
• Sensitivity: 90 dB
• Marine certified to withstand a harsh marine environment

Designed to Perform

The MM840 high performance 8-inch subwoofer maybe compact for a subwoofer but it cranks out waves of bass. As a result of 3 years of Polk research and development, every woofer and driver in the MM Series has been designed to offer unparalleled sound quality with exceptional fit to meet virtually any application. Borrowing technology from our flagship SR Series, the MM Series offers outstanding performance for your mobile audio dollar. With 250 Watts continuous/500 Watts peak power handling, the MM840 is recommended for small sealed (.35 cubic foot) enclosures.

MM840 Features:

New 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 (51mm) and polyamide former withstands the most rigorous use while maintaining extremely low distortion for bass punch and output.

Heavy duty input terminals accommodate speaker wire up to 8 AWG or twisted pairs of 12 AWG.

Advanced carbon composite basket based on the spokes of a wheel is lightweight, will not flex during peaks and looks great! Don’t be afraid to show off the back of your woofer.

Klippel optimized components 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.

Available matching grille complement the wheel spoke design.

Dual voice coil configuration (MM840DVC) also available.

All Polk products are made using the best materials and the most advanced manufacturing techniques. They pass the industry’s most exhaustive quality tests, including drop testing, extreme signal response and UV & salt exposure testing. Polk loudspeakers are built to perform for a lifetime.