Pioneer HTP-2900 5.1 Channel Home Theater Speaker System (Discontinued by Manufacturer) Pioneer hybrid amplifier design with 860 total Watts of power Sound Retriever for improved sound quality of compressed audio Built-in Dolby Digital, Dolby Pro Logic II, and DTS 96/24 decoders 9-mode Advanced Surround with auto and virtual surround features 3 digital inputs (2 coaxial, 1 optical) and 3 audio inputs