TEAC XT-3 2.1 Subwoofer System. Mid-range driver size: 120 mm, Woofer size: 76 mm. RMS rated power: 25 W, Peak Music Power Output (PMPO): 140 W, Frequency range: 150 - 22000 Hz. Type: Home theatre speakers, Dimensions (WxDxH): 86 x 170 x 85 mm, Audio output channels: 2.1