Driver:Woofer 8″ +Tweeter 1″ Frequency Response: 30Hz-20,000Hz Sensitivity(1m,1W): 89dB Speaker Dimensions: 375x280x235mm(HxWxD) Material: Engineering-Plastic Impendance: 8 Ohms Transformer:32w-16w-8w-4w-8Ω(100Vor 70V)