Total Frequency Response 26Hz-25kHz Upper -3dB Limit 24kHz kHzLower -3dB Limit 36Hz HzNominal Impedance 8 ohmsEfficiency 91 dBRecommended Amplifier Power 20-300 watts per channelInputs Dual gold-plated binding posts Height 42 1/2" (107.95cm) Width 9 3/8" (23.81cm) Depth 15" (38.10cm) Overall Dimensions (including base) 42 15/16" H x 12 11/16" W x 16 1/4" D Product Weight (each) 50.0 pounds