The amp I have requires no biasing when switching from EL34's to 6L6gc's. I found that I like the sound of this 6L6 better than the stock JJ or Ruby EL34. The Ruby 6L6 is warmer with less mid bite but combined with a JJ 12axy/Ecc83 it really kicks hard. Awesome.
Product Reviews
The amp I have requires no biasing when switching from EL34's to 6L6gc's. I found that I like the sound of this 6L6 better than the stock JJ or Ruby EL34. The Ruby 6L6 is warmer with less mid bite but combined with a JJ 12axy/Ecc83 it really kicks hard. Awesome.