Driver:Woofer 8″ + Tweeter 0.5″ Frequency Response: 35Hz-20,000Hz Sensitivity(1m,1W): 90dB Speaker Dimensions: 282x105mm(φxD) Material: Engineering-Plastic Impendance: 8 Ohms Transformer:30w-20w-10w-5w-8Ω(100V or 70V)