High Frequency Transducer 1" (25mm) Aluminum dome with HighDefinition Imaging (HDI™); horn Low Frequency Transducer Dual 5.25" (130mm) Polycellulose cone woofer; Recommended Amplifier Power 20-120W RMS; Frequency Response 52Hz-25kHz (-6dB on-axis); Sensitivity (2.83V@1m) 90dB; Nominal Impedance 8ohm; Crossover Frequency 2100Hz; Inputs Nickel-plated springloaded connectors ; Grille Dimensions H 19.5in (496mm) x W 7.6in (194mm); Cutout Dimensions H: 18.1in (460mm) x W: 6.4in (162mm); Mounting Depth 3.2in (84mm) Product Weight (Kg) 3.5Kg