I used to have an UO. I found the better the powercord from the wall to the UO made the biggest improvement.
Power cord between wall and Ultimate Outlet?
Does it matter how good of a cable I run between my Ultimate Outlet and the wall outlet? Should it be my best power cable (I have a nice PS Audio Statement). Or, should I be running a cheaper cable up front (like my PS Audio Prelude or a Signal Cable Magic Power?) and run the nicer cables to my preamp and digital player? What are the pros and cons of each?