Driver ComplementTweeterQuantity 1 Diameter 1" (2.54cm) Type Silk/polymer Dynamic Balance Dome Mid / WooferQuantity 2 Diameter 5 1/4" (13.34cm) Type Dynamic Balance bi-laminate Cones ElectricalTotal Frequency Response 53Hz-25kHz Upper -3dB Limit 24 kHzLower -3dB Limit 63 HzNominal Impedance 8 ohmsEfficiency 91 dBRecommended Amplifier Power 20-125 watts per channelInputs gold-plated 5-way binding posts DimensionsCabinet DimensionsHeight 7" (17.78cm) Width 20" (50.80cm) Depth 8" (20.32cm) Overall Dimensions (including base) 7.0" H x 20.0" W x 8 1/2" D Product Weight (each) 14.6 pounds