Tube Rolling the Jolida/Black Ice dsd Dac


So I recently purchased the Jolida/Black Ice dsd dac and and a pair of Psvane 12ax7’s.  Played thru about 50 hours and while the soundstage opened up some, in my system detail seemed a little rounded off.  They probably need more hours, and  I recognize these are highly subjective impressions and system dependent, but then a friend gave me a pair of Fisher-era Telefunken’s to play with and I have tons of inner detail, imaging and a wide soundstage.  What I do find, however, is I have turn the volume up further on my passive pre-amp.  I have a pair of 50’s era RCA grey plates coming next week.  Pretty easy to go down the rabbit hole playing with tubes, but that’s half the fun of it.  Curious as to what other tubes Jolida dac owners are using. My system: NuForce STA-200 amp, Luminous Audio pre-amp with Walker mod, Bluesound Node2, and DIY LeCleach horn speakers. Mix of Cullen and Transparent Cables.
renisnceman
@jonstine I’m the OP- been using NOS Telefunkens that I’m pretty happy with.  Are these the British Mullards from Upscale you’re referring to?  Pretty tempting.  About 2 weeks ago I replaced the fuse with a SR Orange- pretty nice upgrade.
Old Mullards make everything sound great.  You can throw them in garbage and the trash collector will sing like Frank Sinatra on trash day..  
@renisnceman, yes those are the ones. I selected Kevin’s stash level and added cryo option (what the hell).

Now I need to go research the fuse replacement! Thanks for the heads up on that.
Which SR Orange fuse rating did you select? The writing on mine appears to be 500mA @ 250V, so I assume you went with the 500mA option, but wanted to check.
My Jolida dsd dac’s fuse is spec’d out at 1 amp slo-blo, so that’s what I purchased from SR.  Takes a while to burn in and it’s kind of a rollercoaster ride, but to my ears clear improvement in soundstage, bass and air between the instruments.  Worth the investment.