Quadral Argentum 320. Tweeter size: 25 mm, Woofer size: 135 mm. RMS rated power: 60 W, Peak Music Power Output (PMPO): 90 W, Frequency range: 40 - 45000 Hz. Weight: 4500 g. Type: Bookshelf, Dimensions (WxDxH): 165 x 250 x 310 mm, Audio output channels: 2.0