MM1 Series 12" Single 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 our 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 our 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.

  • Product Specification
  • Support
Tech Specs


  • Total Pieces


  • Included Accessories
    • (1) Stainless Steel Mounting Hardware


  • Drivers Warranty
    1 years
  • Original Purchaser Only

Shipping Cartons

  • Carton 1


  • Qty Included
  • Driver Enclosure Type
    Ultra-Marine Certified
  • Driver Complement
    • (1)  12" (30.48 cm) d (Round) - Subwoofer


  • Shape
  • Diameter
    11.1" (28.19 cm)
  • Full-Range Mounting Depth - Top Mount
    4.65" (11.81 cm)
  • Full-Range Mounting Depth - Bottom Mount
    5.2" (13.21 cm)

Audio Quality

  • Total Frequency Response
    26 Hz → 200 Hz
  • Nominal Impedance
    4 ohms
  • Sensitivity (1 watt @ 1 meter)
    87 dB


  • Continuous Power Handling
  • Peak Power Handling

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 our patented Dynamic Balance technology engineered into every MM1 speaker. Rigorously tested and developed by our 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 water-proof 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.

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MM1 Series Premium 5x7" Coaxial Speakers with Ultra-Marine Certification

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