Elac BS 184. Woofer size: 175 mm. RMS rated power: 70 W, Peak Music Power Output (PMPO): 100 W, Frequency range: 40 - 50000 Hz. Weight: 7500 g. Type: Bookshelf, Dimensions (WxDxH): 200 x 262 x 330 mm, Audio output channels: 1.0