A warm DAC?

@arafiq , good points , +1.  And even if one was present at the session, your recall of the sound in the studio or venue will color your expectations....
"Warm" is, unfortunately, another vague term.  If you want a 'warm' sound from a digital source, one could 'back their DAC' to a SET, and feed it to some Maggies'.
If that's not enough, one may have to place the DAC on a table top plate warmer....
"A man has to know his limitations...."  The same for audioanything....

Cheers, and good luck, J

Prism Sound Callia.  Warmth with detail and texture while retaining good air.

Another vote for MHDT non-OS.  I have a couple older ones. Very pleasing to listen to.

Black Ice Audio Glass FX Tube DAC DSD.

You might try and find a DAC with tube output by Exemplar Audio.