Take your car, boat, or ATV to new sonic depths with Polk DB+ Series Subwoofers. You’ll get Polk’s thunderous, crystal clear and effortless bass from a marine certified subwoofer with a space saving design that’s easy to install and built to last.
 
High Performance Subwoofer for Automobiles, Boats, and ATVs
Marine Certified (IP56 rated): Dirt / Water Resistant, Tested for Salt-Fog, UV, Humidity
Slim Form Factor

EFFORTLESS BASS ON THE GO
Thousands of audio enthusiasts love Polk’s DB+ Series Subwoofers for the rich, clean, and deep low frequency response they provide cars, boats, and ATVs. Built marine tough with a space saving design, DB+ Series Subwoofers add thunderous bass to your ride—wherever life takes you: the road, the trail, the waves—you name it.
 
THE STEALTH SUB
Our DB+ Series Subwoofers utilize our patented Dynamic Balance Technology to combine Polypropylene woofers, non-resonant materials, and exceptional power handling for crystal clear sound with deep, effortless bass. Their slimmed down form factor reduces the need for oversized subwoofer enclosures. You get a look that goes virtually unnoticed—but a sound that doesn’t.
 
MARINE CERTIFIED
DB+ Series Subwoofers are IP56 rated so they are dirt- and water-resistant. They also have been tested for salt-fog, UV and humidity. A big part of that marine certification also means that each subwoofer has a UV tolerant cone, waterproof surrounds, and stainless steel mounting hardware, ensuring that they are fully protected against the elements
 
DESIGNED TO GO THE EXTRA MILE
All Polk loudspeakers rely on our patented process to eliminate electro-acoustic and mechanical issues before they become a part of the finished speaker and are also rigorously tested through Polk’s Klippel distortion analyzers. DB+ Series Subwoofers, in addition to offering IP56 waterproof rating and Marine Certification, have waterproof surrounds that completely block dirt, liquid and grime from entering the speaker housing, all designed to maximize longevity of the speaker.