Subwoofer: Drive Unit : 8 Inches Output Power: 60W(RMS) Frequency: 38Hz-250Hz Impedance: 8 Ohms Sensitivity:85dB THD<0.1% Full Remote Control Tower Speakers: Drive Unit: Front:2.75 inches *4 Center:2.75 inches *3 Surround:2.75 inches*3 (wireless) Output Power:20W(RMS)*5 Frequency:250Hz-20Khz Impedance:8Ohms Sensitivity:85dB