Dual Cone Speaker Size17 cm Impedance4 Ω Frequency response34 – 16.000 Sensitivity89 dB Lowest resonance frequency82 Hz Maximum power280 W Nominal input power40 W Woofer materialIMPP Composite Cone Voice Coil typeCopper Voice Coil bobbin typeKAPTON MagnetsY35 Weight0.57 kg Cut-out Hole144 mm Mounting Depth49.7 mm