I owned the Nixon Tube DAC for some time. It is a very analog sounding DAC, though I found it to be very rolled-off on the highs. It is a decent DAC but it absolutely obscures some musical detail.
You might try the Audio Note Kits DAC 2.1 or RedWine Audio Isbellina, they sound almost identical (I own both) and they both have an extremely analog sound but WITH the highs.
You might try the Audio Note Kits DAC 2.1 or RedWine Audio Isbellina, they sound almost identical (I own both) and they both have an extremely analog sound but WITH the highs.