I have taken almost a year listening to few different tubes, and I rank them as follows :
1. Telefunken E188CC
2. RTC E188CC
3. Gold Aero 6922 EC88
4. Siemens E88CC
5. LIO Stock
6. Mullard E188CC
7. Amperex 6922
Thanks for trying all those tubes and posting your ranking!
Is this the Telefunken E188CC that you ranked # 1:https://www.tubedepot.com/products/telefunken-diamond-bottom-e188cc-7308-gold-pin
Have you even tried 1950s Siemens Cca, Amperex Pinched Waist (or 7308 "PQ"), or MiniWatt Dario E188CC?
So many good tubes to try, so little time
As we have seen with the DHT PRE tube rolling thread - based on your own system and tastes, everyone is going to have different findings with the various tubes and there is no "best" tube in general, but you will find there is a best tube for your tastes
as you listen to different tubes. Definitely post your findings! But to newcomers to tube rolling with their LIO, I just want
to point this out.
Also, there are instances where there are different versions of a particular tube. For example, "Amperex 6922". There
are many different Amperex 6922s (various production years, production countries, gold pins, white/orange/green label,
Have fun and thanks for sharing your experiences,