Driver:Woofer 5.25″ + Swivel tweeter 0.5″ Frequency Response: 50Hz-20,000Hz Sensitivity(1m,1W): 88dB Speaker Dimensions: 203x93mm(φxD) Material: Engineering-Plastic Impendance: 8 Ohms Transformer:16w-8w-4w-8Ω(100V or 70V)