Philips HTS3580. RMS rated power: 1000 W. Center speaker frequency range: 150 - 20000 Hz, Center speaker impedance: 4 Ом. Satellite speaker frequency range: 150 - 20000 Hz, Satellite speaker impedance: 4 Ом. Subwoofer frequency range: 40 - 150 Hz, Subwoofer impedance: 4 Ом. Front speaker dimensions (WxDxH): 161 x 87 x 95 mm, Center speaker dimensions (WxDxH): 95 x 92 x 161 mm, Subwoofer dimensions (WxDxH): 309 x 369 x 123 mm