Crossover Frequencies 2.1kHz; 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 80Hz, 68Hz, 48Hz (-3 dB, -6 dB, -10 dB); Low-frequency Driver Components 2 x 5.25" Aluminum Cone Woofer; Recommended Amplifier Power 40-120W; Sensitivity 89dB (2.83V @ 1M); Dimensions 7.25" x 19.45"x 10.1" (18cm x 49cm x 27cm)—Including Feet; Weight 20 lbs