Power Output:20W+12W*2;Speaker Unit :5.25"+(3"+1.5")*2;Impedance:4oHM; S/N:>=75dB Separation:>=45dB THD:0.3% 1W 1KHz Frequency Response:50Hz-20KHz Power Supply:220V 50Hz/60Hz;Subwoofer Dimensions:W210*H310*D280MM;Satellite Speaker Dimension:W130*H195*D135MM