Elac 31440. Tweeter size: 45 mm, Woofer size: 150 mm. RMS rated power: 60 W, Peak Music Power Output (PMPO): 80 W, Frequency range: 41 - 50000 Hz. Weight: 5200 g. Type: Bookshelf, Dimensions (WxDxH): 170 x 232 x 285 mm, Audio output channels: 1.0