Tech Specs - Type: 3-way bass-reflex floorstanding loudspeaker - Speaker drivers: 3 x 61/2" (16.5cm) Slatefiber Woofer, 61/2" (16.5cm) Slatefiber Midrange, 1” (25mm) Al/Mg inverted dome TAM tweeter - Sensitivity (2.83V/1m): 92dB - Frequency response (+/-3dB): 42Hz - 30kHz - Low frequency point (-6dB): 35Hz - Nominal impedance: 8 Ω - Minimum impedance: 2.9 Ω - Recommended amplifier power: 40 - 300W - Crossover frequency: 280Hz / 3,100Hz - Dimensions (WxDxH) 101/8x143/4x441/8" (25.6x37.5x112.2cm) - Net weight (with grille): 58.4lbs (26.5 kg) - Packaging dimensions (WxDxH): 121/4x183/4x48" (31x47.5x122cm) - Net weight (with packaging): 68.3lbs (31kg)