Artsound E4 B. Tweeter size: 25.4 mm, Woofer size: 101.6 mm. RMS rated power: 50 W, Peak Music Power Output (PMPO): 100 W, Frequency range: 60 - 18000 Hz. Weight: 6.9 kg. Type: In-wall/On-wall/In-ceiling speakers, Dimensions (WxDxH): 160 x 230 x 322 mm, Audio output channels: 2.0