Frequency Response 3 dB from 23 Hz to 45 kHz ±0.5 dB from 29 Hz to 18 kHz ±1.0 dB from 26 Hz to 20 kHz; Height 53.3" (135.4 cm); Width 14" (35.6 cm); Depth 23" (58.4 cm); Weight 146 lb (66.3 kg) Shipping weight; Crossover Frequencies Four-way, high-order acoustic response @150 Hz, 575 Hz, and 2.3 kHz; Finishes Piano black or mahogany finish; High Frequency Driver Components 4" (10 cm) titanium cone midrange; Nominal Impedance 6 ohms (nominal) 3.7 ohms (minimum @ 90 Hz); Low Frequency Extension 10 dB at 17 Hz -6 dB at 20 Hz -3 dB at 23 Hz; Low Frequency Driver Components Three 8" (20 cm) titanium cone woofers; Mid-frequency Driver