Thanks for the input. I don't find that any other part of the high frequencies are distracting just the speech sibilants. I did some more listening with several sources and I believe it is mostly due to the recording I was listening to when I started to notice it. The Dave Matthews and Tim Reynolds Live at Radio City DVD was what I first noticed it on, but I now believe that may be due to the mic work on the live show. I notice it on movies and CDs but it's not nearly as prevalent and the fact that I'm hearing it at all on those sources may be due to the fact that my ears are now attuned to it. While on the subject of Audyssey, my Denon 4308 receiver is under a month old so I'm still getting used to the features. I ran the Audyssey auto setup but I've noticed that the Audyssey EQ settings show up under the auto setup menu but not under the EQ selection menu, so as far as I can tell I have not been able to properly implement it yet. Any suggestions on this?