Charles - my last reference DAC was a tubeDAC, the Spoiler. Do a search and you will find it was excellent.
The problem was that the bass was never as tight as I can get with SS, even using Siemens CCA grey-plates. It is very musical, but leaves some parts of the music lacking. I still have yet to hear a tubeDAC that does everything right, top to bottom. I think the ultimate tube just does not exist. The new Chinese Psvane tubes are impressive however. I have monoblocks with these in them.
Steve N.
Empirical Audio
The problem was that the bass was never as tight as I can get with SS, even using Siemens CCA grey-plates. It is very musical, but leaves some parts of the music lacking. I still have yet to hear a tubeDAC that does everything right, top to bottom. I think the ultimate tube just does not exist. The new Chinese Psvane tubes are impressive however. I have monoblocks with these in them.
Steve N.
Empirical Audio