Yamaha NS-P60. Tweeter size: 22 mm, Woofer size: 100 mm. RMS rated power: 60 W, Peak Music Power Output (PMPO): 180 W, Frequency range: 80 - 30000 Hz. Type: Home theatre speakers, Audio output channels: 5.1, Surround speaker dimensions (WxHxD): 150 x 156 x 265 mm