Type 3 way bass-reflex floorstanding loudspeaker Drivers Two 61/2" (16.5cm) Flax woofer with NIC motor 61/2" (16.5cm) Flax midrange with TMD suspension and NIC motor 11/16" (27mm) ‘IAL3’ pure Beryllium inverted dome tweeter Sensitivity (2,83V/1m) 91dB Frequency Response (+/-3dB) 35Hz - 40kHz Low Frequency Point (- 6dB) 29Hz Nominal Impedance 8Ω Minimum Impedance 3.1Ω Recommended Amplifier Power 40 - 300W Crossover Frequency 260Hz - 2,700Hz Dimensions (HxWxD) 44 x 125/8 x 183/4" (1,118 x 321 x 477mm) Net weight (with front grille) 77.2lbs (35kg) Packaging dimensions (HxWxD) 495/8 x 169/16 x 273/16" (1,260 x 420 x 690mm) Total weight (including packaging) 88.2lbs (40kg)