Pioneer HTS-570 5.1 Channel Home Theater System (Discontinued by Manufacturer) Built-in 6-channel amplifier with 100 Watts-per-channel Auto MCACC setup with 3-band equalizer Built-in Dolby Digital, Dolby Pro Logic II, and DTS 96/24 decoders Sound Retriever for improved sound quality of compressed audio 3 digital inputs (1 coaxial, 2 optical) and 1 analog audio input