12.0-in Woofer w/8 Ohms Impedance & 700 Watts Continuous Power Handling Capacity & Neodymium Inside Slug Magnet Nominal Outer Diameter - mm (in): 320 (12.0) Continuous Power Handing Capacity: 700 Nominal power handling: 350 Watts Frequency Response: 45 - 3000 Hz Sensitivity (1W/1m): 98.5 dB Nominal impedance: 8 Ohms Minimum impedance: 6.5 Ohms Winding material: Copper Winding depth - mm (in): 17.0 (0.67) Voice Coil Diameter - mm (in): 76 (3.0) Cone Shape: Exponential Surround Shape: Triple Roll Former Material: Glass Fibre Magnetic gap depth - mm (in): 11.0 (0.43) Flux Density - T: 1.05 Spider type: Single Pole Design: Straight PoleRecommended Enclosure: 40.0 (1.41)Recommended Tuning in Hz: 60