Peak Power : 700W RMS Power : 350W Vibration Resistant Stamped Steel basket ABS Motor Cover Long Excursion Rolled Surround Ventilated Top and Bottom Pole Plate Polypropylene Rigid Cone Embossed Polypropylene Dust Cap Woven-In Tinsel Leads Progressive Rate Woven Cotton Spider Subwoofers are usually sold as a single unit unless otherwise noted. Authorized Internet Dealer Impedance: 4 Ohm Diameter: 12 Inch