Frequency response: 22 Hz – 1600 Hz Impedance: 4 Ω Maximum input power: 1500W Nominal input power: 400 W Sensitivity: 90 dB Diameter Size: 30 cm Dimensions: 318 mm x 180 mm IMPP™ Composite Cone Magnets: Ferrite Woofer material: IMPP™ Other Specifications speakers Cut-out Hole: 281 mm Mounting Depth: 146 mm Recommended Enclosure (ft³/litre): 1.25 / 35.4 Weight: 3.76 kg