Drives:Woofer 5.25’+ Tweeter 0.5″ Frequency response:80-20,000Hz Sensitivity(1m, 1W): 89 OB Speaker dimension :252×163×163mm(HxW×D) Material:Engineering-Plastics Impedance:8 Ohms Transformer(T):16w- 8w -4w – 2w- 80 (100Vor70V)