This is one of the world's first receivers (the other: our VSX-49TX) to meet LucasFilm's exceptionally rigorous THX-Ultra2 requirements, ensuring optimal playback of all multi-channel and movie formats. To simplify system setup, our Multi-Channel Acoustic Calibration Circuit (MCACC) adjusts output based on its evaluation of your media room's environment, even the capabilities of your speakers. The VSX-47TX also features professional-level processors for high-octane audio in movies and music. And, Pioneer's Direct Energy Super MOSFET circuit delivers 160 watts of power (at 6 ohms) equally to all channels, for exceptionally realistic surround sound reproduction. The Elite two-year warranty applies.