Hey fast, the Reference 5s do require a bit of break-in to sound their best. I don't really remember but it took a bit of time, for sure.
Mine are 10' apart and I'm using the short ports with my speakers 18" from the back wall and 5' from the side walls. They are toed-in slightly so the Uni-Q drivers are pointing over each shoulder in my listening position.
I'm really surprised that they sound "digital" using an all tube system. How many hours do you have on them and how hard are you running them?
I'd let them break in more and, if you still have get the harsh treble, you might want to give your dealer a call to get some suggestions.
Mine are 10' apart and I'm using the short ports with my speakers 18" from the back wall and 5' from the side walls. They are toed-in slightly so the Uni-Q drivers are pointing over each shoulder in my listening position.
I'm really surprised that they sound "digital" using an all tube system. How many hours do you have on them and how hard are you running them?
I'd let them break in more and, if you still have get the harsh treble, you might want to give your dealer a call to get some suggestions.