Logitech Z-3e. RMS rated power: 40 W, Peak Music Power Output (PMPO): 80 W, Frequency range: 35 - 20 Hz. Connectivity technology: Wired. Audio output channels: 2.1, Subwoofer dimensions (WxHxD): 225 x 231 x 229 mm, Surround speaker dimensions (WxHxD): 92 x 79 x 197 mm