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I've looked at these, and am intrigued by them. The issue is cost. At the asking price, you can still get superb NOS 6SN7's, and you can get really good 6SN7s for less. It is hard to justify running the experiment. The same goes for the Psvane globes. Judging by the lack of response to your post, it looks like there aren't many who are inclined to take a chance. 6SN7s are widely used. If no one on AG has tried these tubes, I think Sophia might want to rethink their pricing.
Sorry, but I have some NOS RCA grey glass that cost me $50/tube that are vastly superior to my old style Sophia based on the Full Music tube. I actually preferred a new production Tung-Sol to that Sophia in one application. I'm not spending $200/ tube for Sophia's latest offering until a credible reviewer advocates giving these a try. On the other hand, I've had good luck with some of the Psvane tubes. I might give them a try, but I use multiple 6SN7 and I am not sure I could get more than one to fit. Again, the NOS stuff is so good, there is not much of a driver (no pun intended) for an expensive experiment.
I was blown away by the 2 quads of blue glass KT-88's that I installed in my VAC Phi 300 that I wanted the full complement. Galen Carol audio's website gathers first-hand experiences of the 6SN7's, and the qualities described there are what I'm hearing in the KT-88's.
There's an unmeasurable magic that caused my eyes to well up last night - yeah, the real rare magic of music. In Anne Sophie Von Otter's 'Sovente il sole' (Vivaldi) there's a moment when her voice emanates from the same note at the same moment the violin plays it. Purest beauty.