Canton CHRONO 509 DC. Tweeter size: 25 mm, Mid-range driver size: 180 mm, Woofer size: 180 mm. RMS rated power: 160 W, Frequency range: 20 - 40000 Hz, Impedance: 4 Ом. Weight: 20400 g. Type: Floor-standing speakers, Dimensions (WxDxH): 190 x 1050 x 300 mm