Just fired up my Lyr that I got along with about 40 tubes from another Head-fi member.
So far, I've just rolled four sets of tubes, but can tell you that so far I like the Lorenz bottles
the best and the 61np 'rocket' tubes as well. RCA tubes are very smooth and neutral and
a bit laid back in the bass. I still have some Amperex 'hollands' to try.
Both the russian and the lorenz have great bass, a slight emphasis in the upper midrange
and a smooth, clear...