i have a dac designed by john tucker of exemplar audio. there are no op amps, it uses two e180cc tubes. i have also tried 12at7 and 12au7, with mixed results. it uses a 16-bit phillips chip. i have replaced several pairs of caps and am reasonably satisfied with its performance.
i think taste or preference, trumps technology. some of my favorite components were in production in the 80's and 70's.
i think taste or preference, trumps technology. some of my favorite components were in production in the 80's and 70's.