DESC: White Injected Polypropylene Cone Specially Treated Black Rubber Edge Suspension Vented Motor Structure High Temperature 2 Kapton Voice Coil Heavy Duty Magnet Structure Bumped Yoke Plate For Extended Excursion overall Diameter 15.12 4 Ohms Impedance SPL @ 1W/1M 88.6DB Frequency Response: 34Hz-4kHz 100 Oz. Heavy Magnet Structure Mounting Depth 5.43 200 Watt RMS Power 600 Watt Peak Power