Enjoy quality low frequency audio at any volume level. Has an IP65 weatherproof rating, True-Marine™ accreditation. Featuring an intelligent mounting system for non-intrusive, easy installation, the FM Series subwoofers are designed to be flush mounted with a mounting flange no thicker than 1/8". The FM Series uses 'speaker legs' that keep the subwoofer in place without creating any screw holes to your vessel. 400 Watts Maximum PeakPowerCone / Surround Material: Polypropylene with rubber surround