Size:17 cm Maximum power:300 W Nominal input power:110 W Frequency response:32 – 96.000 Sensitivity:85 dB Impedance:4 Ω Crossover Frequency:2000 Hz Mounting Depth:65 mm. Tweeter: 15 mm Cut-out Hole:144 mm Woofer material:Aramid Fiber Cone Voice Coil type:Copper Round Wire 2-Layer Voice Coil bobbin type:Glass Imide Lowest resonance frequency:59 Hz Tweeter size:29 mm Tweeter material:Aluminium Hard Dome Magnets Woofer: Ferrite Tweeter: Neodymium Weight:1.02 kg High Resolution Audio Open & SmoothTM 2-Way Component.