Kicker 10" KMF Series Free-Air Subwoofer 45KMF102The KICKER KMF 10 inch Marine Subwoofer makes serious bass no enclosure necessary! Made to take the power and the weather, this sub is custom made to bang in your boat. SHOCK WAVES Packed with features and made for marine, KICKER gives you the deep, loud bass your boat needs with the KMF series of subs. FEATURES Two Ohm Voice Coil Injection Molded Polypropylene Cone Co molded Santoprene Surround UniPlate Back Plate And Pole Piece Thick Tinsel Leads