High Frequency Driver Components 1-inch / 25mm Aluminum dome tweeter with Acoustic Lens waveguide; LowFrequency Driver Components 5.25-inch / 130mm Carbon-infused Polypropylene cone woofer; Input Connections Stainless Steel barrier strip screw terminals; Frequency Range 90Hz - 22kHz -3dB; Recommended Amplifier Power 10 - 60 Watts RMS; Transformer Taps 70V; Crossover Frequencies 2.4kHz; Low Frequency Extension -10dB @ 60Hz, -6dB @ 74Hz, -3dB @ 90Hz; Impedance 70V / 100V 60W variable tap with 8-ohm bypass;