Impedance8 ohms; Recommended Amplifier Power80W; Freq Resp 38Hz - 20kHz; Audio Specifications; Loudspeaker Sensitivity86dB 2.83V @ 1m; Low Freq Driver Size and Material6-1/2" (165mm) Polycellulose Woofer; High Freq Driver Size and Material1" (25mm) Silk-Dome Tweete