It's been a bit over two months now that I've been basking in the musical glory of a Kitoki. Last month I began tube rolling and I thought I should share those experiences. I started with the input/driver tubes. My Kitoki came with some 80's Voskhods. There is a fellow locally that will let me take home several options to try after a deposit. I came home with some 6dj8's, 6922's and 7308's. (Context here - I have Omega speakers, Rogue pre amp and a Martin Logan sub.). It was a mix of Mullard and made in the USA Amperex. In my set up the 6dj8's lacked detail, depth and refinement. The worst of the 6dj8's was a pair of Tele's. The 7308's had all those attributes in spades but had no bass or body or presence. There were three pair of 6922's. A pair of Mullard, a pair labeled RCA made in Great Britain and the pair that were magic - a pair of White Label Amperex made in their New York factory and labeled RCA. Overall the 6922's gave the most convincing illusion of a three dimensional, flesh and blood musician/vocalist in my room. Next up I mucked about with four EZ81/6ca4's. I was surprised how much difference the various rectifiers made. I had a Mullard, a GE, a Japanese Raytheon and a Sylvania gray plate. The Raytheon was too bright/glaring. The GE was the quietest of the bunch with very good bottom but a little too much top and a recessed midrange. The Mullard just plain made music. But in the end the Sylvania won out with better grunt and a very easy to listen to presentation especially when listening to some of my old albums. In a while I may do some output tube rolling but the 70's 6p15p-ev's Andrew included with my Kitoki are getting along quite well with their new friends. They are quite fast and do amazingly well with percussion and the striking of the hammers on piano strings. They actually have a bit of a cult following of their own. Well enough blah, blah, blah and back to the music.