Driver:Woofer 8″ +Tweeter 1″ Frequency Response: 30Hz-20,000Hz Sensitivity(1m,1W): 89dB Speaker Dimensions: 378x244x240mm(HxWxD) Material: Engineering-Plastic Impendance: 8 Ohms Transformer:50w-25w-12.5w-6.25w-8Ω(100Vor 70V)