Driver:Woofer 6.5″ + Swivel tweeter 0.5″ Frequency Response: 45Hz-20,000Hz Sensitivity(1m,1W): 89dB Speaker Dimensions: 228x85mm(φxD) Material: Engineering-Plastic Impendance: 8 Ohms Transformer:20w-10w-5w-8Ω(100V or 70V)