Net Weight 80 lb (36 kg); Crossover Frequencies 270 Hz, 2200 Hz; Enclosure Type Bass-reflex via Front-firing Port; Finishes Piano Black or High Gloss Walnut; High-frequency Driver Components 1” (2.5 cm) Aluminum Tweeter with Acoustic Lens Waveguide; Nominal Impedance 8 ohms; Input Connections Dual Sets of Binding Posts; Low Frequency Extension -10dB@23Hz, -6dB@27 Hz, - 3dB@31Hz; Low-frequency Driver Components Dual 8” (20 cm) Aluminum Cone, Cast-frame Woofers; Mid-frequency Driver Components 5.25” (13.3 cm) Aluminum Cone, Castframe Midrange; Recommended Amplifier Power 50-350; Sensitivity 88.5dB; Dimensions (H x W x D) 46.6" x