If I know you you had a lot of fun doing those power tube evaluations will! I'll check the Rubys out next time I go to buy power tubes. Sounds as if they'll be a nice alternative for me to use.

Yes, I think I like the signature of the 6N1P as it does seem to work in taming the harsher sounding recordings I have and allow me to just listen to the music more than the sound. And I've learned something about myself over time: when I find something that really works for me I keep it as long as I can, whether it's a tube, an amp, a motorcycle. Even friends and lovers.

You've described well it seems to me the different power tubes and their characteristics. I find the 6N1P is the anchor for me, and I build around it. I think you'll find the Super Cryo to improve ovcer the next weeks.