JL Audio M3 10" Marine Subwoofer w/Grey Metallic Sport Grille - M3-10IB-S-Gm-4 [010-03071-00]M3 10" Marine Subwoofer with Grey Metallic Sport Grille M3 10IB S Gm 4 PLAY BETTER M3 marine subwoofers are purpose built to deliver incredible sub bass performance in moderate power applications. Features: Produces amazing bass in open air applications Engineered for use without a dedicated enclosure Exceeds international standards for salt fog and UV exposure 3 Year Warranty Outstanding Sound Quality This is bass that will impress you, not only with