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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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For pick-up:   Please give us a call to confirm your order so we can have the product ready for you.

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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