High Frequency Transducer 1" (25mm) Aluminum dome with HighDefinition Imaging (HDI™) horn; Low Frequency Transducer 8" (200mm) Polycellulose cone woofer; Recommended Amplifier Power 20-120W RMS; Frequency Response 42Hz-25kHz (-6dB onaxis); Sensitivity (2.83V@1m) 90dB; Nominal Impedance 8ohm;Crossover Frequency 1700Hz; Inputs Nickel-plated springloaded connectors; Grille Dimensions H 15.7in (400mm) x W 10.5in (266mm); Cutout Dimensions H: 14.6in (372mm) x W: 9.4in (238mm); Mounting Depth 3.9in (102mm); Product Weight (Kg) 2.8Kg