HT-2010R AC-3 5.1 Channel Home Theatre Full remote Control Satellite speakers Subwoofer: Drive Unit: 6.5inch Output Power: 30W(RMS) Frequency: 38Hz-250Hz Impedance: 4Ω Sensitivity: 85dB THD<0.1% Speakers: Drive Unit: Front: 3 inch x 1 Center: 3 inch x 1 Surround: 3inch x 1 Output Power: Front:10W; Center:10W; Surround: 10W Frequency:250Hz-20kHz Impedance: 8Ω Sensitivity: 85dB