Planet Audio BB212D 12-Inch 2400 Watts 4-OHM Dual Voice Coils Max Power Handling DVC Subwoofer (Discontinued by Manufacturer) Power Handling (Peak) 2400W , Power Handling (Contin.) 1200W , Freq. Response 12Hz- 350Hz , Efficiency (1 Watt/1 Meter) 95Db , Impedance Dual 4 Ohm, Magnet Structure 150 Oz. , Voice Coil Former 3-Inch , Mounting Depth 7-7/8-Inch Diecast Aluminum Basket Non-Pressed Paper Cone 7-Layer High Density, Fat Rolled Foam Surround Dual Flat Spiders With Woven Tinsel Leads Black Anodized Aluminum Voice Coil Former Insulated Lead Wires Exclusive Para-Term Connection System 12-Inch Dual Voice Coil Subwoofer