Driver:Woofer 6.5″ + Tweeter 0.5″ Frequency Response: 50Hz-20,000Hz Sensitivity(1m,1W): 89dB Speaker Dimensions: 232x92mm(φxD) Material: Engineering-Plastic Impendance: 8 Ohms Transformer:20w-10w-5w-8Ω(100V or 70V) Backcan:Steel backcan