Boss Marine waketower speaker systems are built to deliver superior performance in the toughest conditions. Polypropylene cones and rubber surrounds are impervious to moisture, including saltwater. A protective coating is applied to block UV rays which maintains material integrity and keeps the speakers looking new. Metallic injection cone with metal grilles. 550 watts peak power handling. 4 ohm impedance. 2 x 1" mylar dome tweeter. Fits 1.5" to 2.5" waketower pipes.