I joined this forum because I've noticed a lot of Rogue Audio users here from reading other threads. I bought a used Rogue Audio Pharoah a couple months ago to replace my Sphinx V2. It's being used with Monitor Audio Silver 8s. At first, it seemed like a decent upgrade over the Sphinx, considering the price I paid. It has better channel separation and dynamics. I also rolled in some NOS Brimar CV4003 tubes into the Pharoah and perceived a notable improvement in most respects. I then swapped out the Pharoah for my old Yamaha AS-500, just for kicks. To my surprise, the Yamaha was much closer in performance to the Pharoah than I'd like to admit. Channel separation and dynamics were inferior to the Pharoah, but I have to give the nod to the Yammy for better noise floor and low end bass. Swapped the Pharoah back into my system and have been listening for the past few nights. I find that it's not very long before I start feeling the fatigue I usually associate with excessive brightness. I didn't experience this issue with the Yamaha. Has anyone else here been enamoured with the sound of their new gear, then one day, it no longer makes the cut? I wonder if this is possibly a case of tubes gone bad. I'm thinking maybe I should try an integrated with a more traditional Class AB topology. I'm looking at the Parasound Halo. Any suggestions? Thoughts? Many thanks.