The Audyssey literally didn't work, it didn't show up on the screen and it made no adjustments whatsoever. But, now that I have the Marantz I may try it. However, my wife and I listened to the Marantz for the first time tonight and played SACD, DVD Audio, HDCD, and regular CDs and we were blown away. All music was played through my Oppo 980h and I switched back and forth between HDMI and 7.1 analog. For SACD and DVD Audio, plus HDCD, I thought the analog sounded better. But analog or HDMI, the sound was by far the best I've ever had. Although I'm a Denon fan, the 2311 wasn't even remotely close to this sound. The best sound I had prior was when I had the JVC RX-DP10VBK, which was JVC's flagship AV receiver. I had a Denon 3910 CD player at that time and the JVC did a great job at playing DVD Audio through the 7.1 analog connections but when playing regular CDs it was good but not exceptional, a little better than the Denon 2311. But the SR5005 plays regular CDs better than any receiver I ever had. No more ear piercing highs when playing regular CDs loud. Prior to today I had been disappointed in the Oppo 980 except for when I was playing SACD or DVD Audio but now it sounds great and I don't regret getting rid of my Denon 3910. The SR5005 is amazing. I played a few songs from The Best of Graham Parker and The Rumour tonight and that cd has very poor sound, and even that sounded good.