Elac IW 1230. Woofer size: 140 mm. RMS rated power: 55 W, Peak Music Power Output (PMPO): 80 W, Frequency range: 60 - 50000 Hz. Weight: 3000 g. Type: In-wall/On-wall/In-ceiling speakers, Dimensions (WxDxH): 220 x 105 x 308 mm, Audio output channels: 1.0