Frequency response: 20 Hz – 6600 Hz Impedance: 4 Ω Dual Voice Coil (DVC) Maximum input power: 1500 W Nominal input power: 500 W Sensitivity: 76 dB Series: D-Series Diameter Size: 25 cm Dimensions: 267 mm x 156 mm IMPP™ Composite Cone: Magnets: Ferrite Woofer material: Aramid Fiber Interlaced Injection Molded PolyPropylene (IMPP™) Cone Cut-out Hole: 230 mm Mounting Depth: 140 mm Recommended Enclosure (ft³/litre): 0.7 / 19.81 Speaker Grill: Not Included Weight: 4.04 kg