Specs Type : Two-way bass-reflex floorstanding center loudspeaker Woofer : Two 6 1/2" Flax bass - midrange Tweeter : 1" Al/Mg TNF inverted dome tweeter Frequency response (+/- 3 dB) : 57 Hz - 28 kHz Low frequency point - 6 dB : 50Hz Sensitivity (2.83V / 1m) : 91 dB Nominal impedance : 8 Ohms Minimum impedance : 4.3 Ohms Recommended amplifier power : 40 - 200 W Crossover frequency : 2800 Hz Dimensions (H x W x D) : 200 x 533 x 245 mm Weight : 10.5 kg