Re: Tone difference: EL84 vs. 6L6?
A few years back, I had an F50, and I've played the F30 on a number of occasions.
Looking back, I should have got the F30. Its got more "british" midrange characteristics with the EL84s, and for a gain channel thats what I prefer.
The F50 has the better clean channel though, IMO. The 6L6 sound is much more Fendery/American. The gain channel is more highs and lows than midrange.
Both are extremely nice amps. Very well made and loud as hell.