Elac FS 137 JET. Woofer size: 140 mm. Peak Music Power Output (PMPO): 120 W, Frequency range: 35 - 50000 Hz, Impedance: 4 Ом. Amplifier output power: 180 W. Weight: 16000 g. Type: Floor-standing speakers, Dimensions (WxDxH): 225 x 320 x 950 mm, Audio output channels: 1.0