The Pioneer VSX-AX4AVI-S represents the future of A/V recievers, the THX select 2 certification guarentees the highest standard in audio quality, add to that the latest surround sound formats including Dolby Digital EX, Pro logic IIx, DTS 96/24 and DTS Neo:6, a massive 180 Watts coming from each of its seven channels and a fully digital video signal convertor for a crystal clear picture, this is a fantastic reciever at an incredible price! Pioneers VSX-AX4AVI-S one of the first-ever reciever in the industry to recieve THX Select2 certification. This Multi-channel receiver provides additional THX listening modes for enhanced playback of a variety of entertainment, including movies, music and games. Thanks to full 7.1-channel THX EX processing, it will bring you the best possible sound reproduction using 7 channels, whether you watching, listening or playing! Minimize