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Polk Audio MM840 8" Single 4 ohms Mobile Monitor MM Series Marine Certified Car Subwoofer

Item #: 81415 Availability: In Stock
Mfg Part No.: MM840 Condition: Brand New
(MM-840, MM840svc, MM-840svc)

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Sale Price: $108.15
Retail: $139.99
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Polk Audio's Mobile Monitor Series subwoofers bring out superior performance from lighter materials, so you'll get the impact you want without the extra weight of a conventional system. Advanced engineering and optimized components reproduce your sound with uncompromising accuracy, for low end that is rich and clear.

The MM840 8" 4-ohm subwoofer handles up to 250 watts RMS. A copper voice coil and neodymium magnet motor drive the polymer cone with exceptional efficiency. The carbon composite basket features a "wagon wheel" design that resists flexing during heavy excursion, so your sub hits solidly without distorting.

This sub is certified for marine use, and Polk includes corrosion-resistant stainless steel mounting hardware.


  • Polk Audio MM840 8" Marine Single 4 ohm Mobile Monitor MM Series Subwoofer
  • Power Handling:
    • Peak: 500 watts
    • RMS: 250 watts
  • Impedance: 4 Ohms
  • 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
  • top-mount depth: 4"
  • sealed box volume: 0.35 cubic feet
  • Marine certified to withstand a harsh marine environment
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