Hey, @emergingsoul - Thanks. I have a typo in my comment. It's a 12AT7, not AT12.
As a follow-up, I previously went down the path of MELZ metal plate 6N8S tubes in both stages (before the adapters and tube changes to Telefunken and Sylvania) and the sound signature was a bit warmer, though not really improved. I also suspect with the mismatched output of the Freya+ and the inputs for the Tyrs (Why Schiit, why are they so far apart?), I might be able drive the Tyrs and downstream Magnepan 3.7is at higher volumes and lower distortion levels. My only concern is I'd be stripping what is happening with the Telefunken tubes and listening to my Tyrs alone. Anyone done this combo? At least Benchmark has a 30 day return policy if I buy it and it sounds awful.