Polk Audio 8" DVC MM1-Series Subwoofer with Marine Certification

Model: MM842DVC UPC: 747192128128 Item: 169060

Product Information

MM1 Series 8" Dual Voice Coil Subwoofer with Ultra-Marine Certification


  • Premium upgrade tuned for the total sonic accuracy found in a studio subwoofer
  • Meticulously conceived, designed, and engineered for advanced high performance bass
  • Dynamic Balance technology provides rich, clean, full-range sound by eliminating distortion and unwanted resonant frequencies
  • High excursion bump stack motor structure provides more audible throw

MM1 Series

MM1 is the next generation of Polk's highly-acclaimed Mobile Monitor series—conceived, designed, and engineered to deliver premium audio with thunderous bass, enhanced sonic detail, and ultra-durable construction. It’s the one crafted for full-on powerful sound, no matter what vehicle you’re in. Hear rich high-fidelity wherever you go with Polk's Dynamic Balance technology, and enjoy more audible throw, increased power handling, and minimized air chuffing—all housed in an IP56 rated enclosure that’s Ultra-Marine Certified.

Premium Upgrade

Tuned for the total sonic accuracy you get in a studio subwoofer, the MM1 Series reconfigures this kind of high-quality deep bass impact for an on-the-go listening experience that totally outperforms your OEM factory setup.

Advanced High Performance Bass

Every element of the MM1 Series is meticulously engineered for thunderous bass, enhanced sonic detail, and ultra-durable construction—Dynamic Balance technology, a high excursion bump stack motor structure, glass fiber formers, multilayered and oversized voice coils, high-temp Conex spiders, a vented pole and basket structure, and integrated fuses.

Dynamic Balance Technology

Enjoy a rich, clean, full-range sound with Polk's patented Dynamic Balance technology engineered into every MM1 speaker. Rigorously tested and developed by their talented Polk Audio engineers, whose passion rests in the principles of great sound, Dynamic Balance technology features non-resonant materials so you get clean, core-pounding lows no matter what you’re listening to.

High Excursion Bump Stack Motor

Enjoy more audible throw for a deep bass experience that’s bound to excite your senses.

Multilayered Voice Coil

Provides increased motor strength for tighter, more accurate sound.

Glass Fiber Formers, Oversized Voice Coils and High Temperature Conex Spiders

All three combine to create a high efficiency driver, for clean, clear bass, increased power handling, better linearity, lower distortion, and greater durability.

Vented Pole and Basket Structure

Offers increased cooling, power handling—and minimized air chuffing.

Integrated Fuses

Protects the subwoofer against overpowered amplifiers.

Ultra-Marine Certified

Featuring an IP56 rating that’s dirt- and water-resistant, it includes a non-corrosive fiberglass reinforced ABS basket, a waterproof surround, weep holes for proper drainage, and a composite cone for extra, long-lasting protection against the elements—all of it salt-fog and UV tested.

Waterproof Santoprene Surround

This attractive high performance material maximizes throw with its ultra-flexible, ultra-durable properties—and prevents the elements from entering the speaker unit. Plus, it combats the harsh effects of boat cleaning agents.

Non-Corrosive Fiberglass Reinforced Baskets

Offers heavy-duty protection for back half of the speaker, which helps prevent corrosion and general wear and tear.




  • Total pieces: 1


  • Included accessories: (1) Stainless steel mounting hardware


  • Drivers warranty:1 year
  • Original purchaser only: Yes


  • Driver enclosure type: Ultra-marine certified
  • Driver complement: (1) 8" (20.32 cm) d (Round) - Subwoofer

Cut-Out Dimensions

  • Shape: Round
  • Diameter: 7.28" (18.49 cm)
  • Full-range mounting depth - Top Mount: 4.13" (10.49 cm)
  • Full-range mounting depth - Bottom Mount: 4.69" (11.91 cm)

Audio Quality

  • Total frequency response: 30 Hz → 200 kHz
  • Sensitivity (1 watt @ 1 meter): 85 dB


  • Continuous power handling: 300W
  • Peak power handling: 900W

What's in the Box

What's in the Box:

  • One MM842DVC subwoofer
  • Stainless steel mounting hardware
  • Owner's manual



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Why did you choose this?
World Wide Stereo Store
I trust Polk Audio's product quality. This subwoofer meets and exceeds my boating needs.
Hector R on Sep 25, 2018
I trust Polk Audio's product quality. This subwoofer meets and exceeds my boating needs.
Hector R on Sep 25, 2018
can 4 (842DVCs) be connected to one amp? would system load be 1A? like owner's manual diagram with 1 additional sub?
A shopper on Jul 16, 2019
  Four dual 4-ohm voice coil subwoofers can be wired to a single monoblock amplifier and present a final impedance of 2 ohms.