Crossover Frequencies 1.8kHz; Enclosure Type Sealed; High-frequency Driver Components 1" Aluminum Tweeter with Acoustic Lens Waveguide; Nominal Impedance 6 Ohms; Input Connections Five-way binding posts; Low Frequency Extension 70Hz, 58Hz, 43Hz (-3 dB, -6 dB, -10 dB); Low-frequency Driver Components 6.5" Aluminum Cone Woofer; Recommended Amplifier Power 30- 120W; Sensitivity 90dB (2.83V @ 1M); Dimensions 14.75 x 13.3 x 5.5 Inches (37.47 x 33.79 x 13.97 CM)—Including Feet; Weight 14 lbs