The most complex component in all of home theater is the AV preamp. Consumers are wary of the category as the HDMI standard has changed more time than Cher at a Las Vegas show. AV Preamps are like computers thus don't hold their values like stereo preamps or power amps but they represent the merger of the idea of a surround sound processor and a stereo preamp thus potential system simplicity for many home theater enthusiasts and audiophiles looking for 5.1 or 7.1 sound. For a full archive of AV Preamp Reviews
read this page from HomeTheaterReview.com.