Here's my feedback on Shinkoh resistors. First they're very musical it's obvious, they transform the dac in something that makes music and not only sound. In classical I particularly love violin concertos and sonatas and with stock havana violin was harsh and metalic sounding, that is no more the case with shinoh res. Voices are much more beautiful as well, well in general everything is more refined, softer and natural sounding. I must say it's a radical change regarding this points (it still can be better but it seems Shotky diodes improve that as well according to some comments).
However Shinkoh res dramatically dull, warm and close the sound. Such a point that I didn't recognize my cds and for me low frequencies and low-mids were not at their right place, I was completely lost. To my ears, even if it was much more musical, it was completely unbalanced and very dull. I must precise that I always prefer airy and opened systems to dull and too warm ones. I also found the dac very fat, as if I was listening to a bad Sugden mk2 series if you know these amps. So last night I was not sure at all I would keep Shinkohs in the dac.
This afternoon I put the 0.22uf Silver/gold/oil mundorf cap on C11 to see and phew what a relief. It was then airy again, opened, and above all, well balanced. Everything sounds much more at its place now. So to my ears Shinkoh res a a big deal if they are balanced with a more bright and transparent component but I can't imagine put them without the mundorf cap on c11. I think FT3 russian cap on c11 must be very interesting with shinkohs, too bad it's so huge and hard to fit into the havana.
It's still a bit too dull and warm for me like this but this time it's more a question of tastes (I also need to let the mundorf cap break in more). I also need to tighten the low frequencies as they sound a bit fat or round to me. But I must say the havana is very musical now and quite well balanced to my ears and in another league than before once again. I'll go on a bit like this but I may try to mix Shinkoh res with more thin/neutral ones later, I noticed Caddock MK-132
and Holco H2/H4 were good ones so why not having a trydepending on how Havana' sound will evolve with next changes.