The PM210SX is a black 10? Subwoofer designed for marine watercraft or powersports applications. It features a stainless steel sport grille and is UV and moisture resistant. Can be used in sealed, vented or infinite baffle installations. NOTE: Any return that does not have a return authorization number written on the outside of the package will not be accepted. Sound of Tri-State has the sole discretion as to what is warrantied. It is our intention to keep you, the customer… Continue Reading ››