B&C Speakers 12NW76-8 LF Drivers 12-Inch Woofer 8 Ohms Impedance 500 Watts Rms 1000 Watts Max Continuous Power Handling Capacity Neodymium Ring Pro Audio Component Speaker Driver for Motorcycle Car || HIGHLIGHTS 1000 W continuous program power capacity | 76 mm (3 in) copper voice coil | 40 - 2000 Hz response | 98.5 dB sensitivity | Neodymium ring magnet assembly | Aluminium demodulating ring allows a very low distortion figure | Ventilated voice coil gap for reduced power compression | || SPECIFICATIONS Nominal Diameter : 320 mm (12.0 in) | Nominal Impedance : 8 Ω | Minimum Impedance : 6.9 Ω | Nominal Power Handling1 : 500 W | Continuous power handling2 : 1000 W | Sensitivity (1W/1m)3 : 98.5 dB | Frequency Range : 40 - 2000 Hz | Voice Coil Diameter : 76 mm (3.0 in) | Winding Material : Copper | Former Material : Glass Fibre | Winding Depth : 19.0 mm (0.75 in) | Magnetic Gap Depth : 11.0 mm (0.43 in) | Flux Density : 1.3 T | || DESIGN : | Surround Shape : Triple Roll | Cone Shape : Exponential | Magnet Material : Neodymium Ring | Spider : Single | Pole Design : T-Pole | Woofer Cone Treatment : TWP Waterproof Both Sides | Recommended Enclosure : 50.0 dm3 (1.77 ft3) | Recommended Tuning : 60 Hz | || PARAMETERS Resonance Frequency : 40 Hz | Re : 5.3 Ω | Qes : 0.17 | Qms : 3.7 | Qts : 0.16 | Vas : 76.0 dm3 (2.7 ft3) | Sd : 522.0 cm2 (80.9 in2) | η₀ : 2.8 % | Xmax : ± 8.0 mm | Xvar : ± 10.0 mm | Mms : 77.0 g | Bl : 25.5 Txm | Le : 1.25 mH | EBP : 235 Hz | || MOUNTING AND SHIPPING INFO || Overall Diameter : 315 mm (12.4 in) | Bolt Circle Diameter : 298 mm (11.7 in) | Baffle Cutout Diameter : 283.0 mm (11.1 in) | Depth : 147 mm (5.8 in) | Flange and Gasket Thickness : 14 mm (0.55 in) | Air Volume Occupied by Driver : 2.5 dm3 (0.08 ft3) | Net Weight : 4.9 kg (10.8 lb) | Shipping Units : 1 | Shipping Weight : 5.8 kg (12.79 lb) | Shipping Box : 360x360x200 mm (14.17x14.17x7.87 in) |