Magnat Quantum 553. Tweeter size: 25 mm, Woofer size: 170 mm. RMS rated power: 90 W, Peak Music Power Output (PMPO): 160 W, Frequency range: 30 - 55000 Hz. Weight: 7600 g. Type: Bookshelf, Dimensions (WxDxH): 215 x 320 x 360 mm, Audio output channels: 2.0