General Specifications Nominal diameter - 12", 304.8mm Power rating - 200W Nominal impedance - 8 Sensitivity - 94dB Magnet type - Ferrite Voice coil diameter - 2", 50.8mm Coil material - Copper Cone material - Kevlar loaded paper Former material - Polyimide Surround material - Cloth-sealed Frequency range - 45-3500Hz Xmax - 0.15", 4mm Gap depth - 0.31", 8mm Voice coil winding width - 0.62", 16mm Small Signal Parameters D - 0.26m/10.2in Fs - 45Hz Mms - 47.6g/1.68oz Qms - 2.74 Qes - 0.49 Mmd - 40.7g/1.44oz Qts - 0.42 Re - 5.88 Vas - 104.6lt/3.7cu. ft. BI - 12.71Tm Cms - 0.26mm/N Rms - 4.92kg/s Le (at 1kHz) - 1.0mH Mounting Information Cut-out diameter - 11.1", 283mm Diameter - 12.2", 309mm Mounting slot dimension - 0.31", 7.9mm Ø Mounting slot PCD - 11.7", 297mm Number of mounting slots - 4 Overall depth - 5.1", 130mm Unit weight - 7lb, 3.2kg