The Premium Upgrade—tuned to provide the unparalleled sonic accuracy and deep bass impact that you’ll find in recording studio subwoofers, but in a durable, ultra-marine certified design, Polk’s MM1 Mobile Monitor Series subwoofers provide an on-the-go listening experience that’s more powerful than anything you’ll experience from the stock factory set up in your car, boat, motorcycle or ATV.
- Ultra-marine certified (IP56 rated)
- Dirt & water-resistant & tested for salt-fog, UV & humidity
- Used in Automobile, Boats & ATVs
- 10" Dynamic Balance® dual voice-coil polypropylene woofer
