Artsound ASW55 B. Tweeter size: 25.4 mm, Woofer size: 133.4 mm. RMS rated power: 75 W, Peak Music Power Output (PMPO): 200 W, Frequency range: 85 - 20000 Hz. Weight: 5.5 kg. Type: In-wall/On-wall/In-ceiling speakers, Dimensions (WxDxH): 187 x 165 x 269 mm, Audio output channels: 2.0