Pioneer 5.1ch tuner amplifier enjoy your favorites in high quality and.enjoy room great surround sound and powerful bass which can fill any room or hall of any size. it's very powerful and neat.Gives plenty of power for all. Using a Texas Instruments Aureus Digital Signal Processor at its heart, the VSX-322 offers powerful processing and includes both Dolby TrueHD and DTS-HD Master Audio decoders. Pioneer has fitted with their Advanced Sound Retriever system. This enhances the typically compressed music from MP3/AAC systems and returns the sound to near-CD quality.