Samsung HT-Q9 Home Theater System, DVD player, 1 discs, 5.1 channels, 180 W, Dolby Digital, Dolby Pro Logic II, DTS, MP3, WMA Samsung HT-Q9 Home Theater System. Optical disc player type: DVD player, Number of optical discs: 1 discs. Audio output channels: 5.1 channels, RMS rated power: 180 W, Audio decoders: Dolby Digital, Dolby Pro Logic II, DTS. Supported radio bands: FM. Subwoofer RMS power: 30 W. Subwoofer dimensions (W x D x H): 130 x 320 x 314 mm, Subwoofer weight: 3.1 kg