High Frequency Transducer 1" (25mm) Aluminum dome with Acoustic Lens; Low Frequency Transducer 8" (200mm) Polycellulose cone woofer; Recommended Amplifier Power 20- 120W RMS; Frequency Response 42Hz-25kHz (-6dB on-axis); Sensitivity (2.83V@1m) 90dB; Nominal Impedance 8ohm; Crossover Frequency 3400Hz; Inputs Nickel-plated spring-loaded connectors; Grille Dimensions Dia: 11in (280mm) Cutout Dimensions Dia: 9.6in (244mm); Mounting Dept 4.4in (113mm); Product Weight (Kg) 2.2Kg