Height 7.9" (20 cm) Note; Width 21" (53.2 cm); Depth 11.5" (29.2 cm); Weight Net Weight; Crossover Frequencies 1.7 kHz; Enclosure Type Sealed; Finishes Piano Black, Piano White, or High Gloss Walnut; Highfrequency Driver Components 1” (2.5 cm) Aluminum Tweeter with Acoustic Lens Waveguide; Nominal Impedance 8 Ohms; Input Connections Binding Posts; Low Frequency Extension -10dB@46Hz -6dB@62Hz -3dB@80Hz; Lowfrequency Driver Components Dual 5.25” (13.3 cm) Aluminum Cone, Cast-frame Woofers; Recommended Amplifier Power 50-120; Sensitivity 89dB