Magnat Quantum 605. Tweeter size: 25 mm, Mid-range driver size: 170 mm, Woofer size: 170 mm. Frequency range: 22 - 55000 Hz, Impedance: 4 Ом, Sensitivity: 92 dB. Weight: 19700 g. Type: Floor-standing speakers, Dimensions (WxDxH): 195 x 335 x 990 mm, Audio output channels: 2.0