Sir Speedy,
I'm too lazy to do much more than tube swapping. I have experimented with different 12AX7 variants. The "crazy expensive" pair for me was a set of Telefunken ECC 803Ds. As it turned out, I prefer a "free" pair (given to me by a friend) of Telefunken ECC83s.
Good luck with the Phantom. A friend of mine runs an Orpheus on the Phantom (Basis table). That is a very nice sounding combination.
I'm too lazy to do much more than tube swapping. I have experimented with different 12AX7 variants. The "crazy expensive" pair for me was a set of Telefunken ECC 803Ds. As it turned out, I prefer a "free" pair (given to me by a friend) of Telefunken ECC83s.
Good luck with the Phantom. A friend of mine runs an Orpheus on the Phantom (Basis table). That is a very nice sounding combination.