DESC: Golden Injected Polypropylene Cone Wide Non-Fatiguing Rubber Suspension\ Golden-Plated Steel basket w/Golden Terminal Golden-Plated Backplate w/Bumped & Vented Structure High Temperature 2.5 Kapton Voice Coil Double Magnet Structure 4 Ohm Impedance overall Diameter 12.20 4 Ohms Impedance SPL @ 1W/1M 85.8DB Dual 60 Oz. Heavy Magnt Structure Mounting Depth 6.10 600 Watt RMS Power 1200 Watt Peak Power