Panasonic SC-HTB550. RMS rated power: 240 W, Audio output channels: 2.1, Audio decoders: Dolby Digital, Dolby Pro Logic II, DTS. Soundbar speaker RMS power: 120 W, Impedance: 6 Ом, Total Harmonic Distortion (THD): 10 %. Subwoofer RMS power: 120 W, Subwoofer impedance: 8 Ом. Receiver type: External. Power source: AC, AC input voltage: 220-240 V, AC input frequency: 50 Hz