Artsound MDC64. Woofer size: 165.1 mm. RMS rated power: 50 W, Peak Music Power Output (PMPO): 100 W, Frequency range: 95 - 20000 Hz. Weight: 2 kg. Type: In-wall/On-wall/In-ceiling speakers, Dimensions (WxDxH): 177 x 80 x 177 mm, Audio output channels: 2.0