Elac CC 121. Woofer size: 140 mm. Peak Music Power Output (PMPO): 120 W, Frequency range: 44 - 25000 Hz, Impedance: 4 Ом. Amplifier output power: 180 W. Weight: 8200 g. Type: Home theatre speakers, Dimensions (WxDxH): 435 x 285 x 175 mm, Audio output channels: 1.0