Nominal Diameter: 210 mm / 8 in Nominal Impedence: 8 O Rated Power AES (1): 200 W Continuous Program Power (2): 400 W Sensitivity @ 1W/1m (3): 88.8 dB Voice Coil Diameter: 50 mm / 2 in Voice Coil Winding Depth: 18 mm Magnetic Gap Depth: 5 mm Flux Density: 0.89 T Magnet Weight: 930 g Net Weight: 2.7 kg