Yamaha NS-F700. Tweeter size: 30 mm, Mid-range driver size: 130 mm, Woofer size: 160 mm. RMS rated power: 40 W, Peak Music Power Output (PMPO): 160 W, Frequency range: 45 - 50000 Hz. Driver cone material: Aluminium. Width: 354 mm, Depth: 374 mm, Height: 1012 mm. Type: Home theatre speakers, Dimensions (WxDxH): 354 x 374 x 1012 mm, Speakers: 3-way