JBL Stage Marine Subwoofers are ready to take on your next outdoor adventure. These fully marinized speakers not only deliver JBL sound, but they bring the sound to life. Engineered to withstand sun, salt, sea spray and wash downs, they feature sealed motor structure, UV resistant one-piece cast-polymer baskets and rubber surrounds. The polypropyelene cone provides great bass and lots of output to ensure low frequencies can be heard loud and clear.