Most Musical 6NS7 tube for a Preamp?

I recommend the Shuguang Treasure CV181-T/6SN7.
I use them in my Don Sachs preamp. Lot's of resolution top to bottom, meaty and musical...it’s also quiet and reliable. I think it looks great too.

But don’t take my word for it. Don Sachs has every holy grail version of the 6SN7 tube and he says this one kills every one of them.

Apparently the newer Shuguang WE6SN7 is a little bit better. I have listened to this one too but not long enough to hear the difference. It sounded just as good to me. It is a bigger tube and may not fit in all applications.

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I think you will love the Don Sachs model 2. I have one with the last all-wood case because I didn’t want balanced inputs/outputs...but did want all the new upgrades/6BY5GA full wave rectifier mod. It is not ‘tubey’...and almost solid state like in its resolution but very musical. 

Well, the Don Sachs Model 2 has evolved quite a bit from only a year ago. It has better caps, a full wave rectifier (you can hear the difference...as it ships with a half wave rectifier too), sealed input relays, better tubes, new housing/casing. And you can have it made-to-order...to match the input impedance of whatever amp you’re feeding.