Re: Mesa Boogie EL84s
No, they aren't JJ, Russian I suspect. I don't care for them, but if it works for you......
I suppose it's best to use the tubes that the amp was designed around.
Every Mesa tube I've tried sounded either lifeless or sterile or harsh. BUt I don't have a MESA amp, (Marshall) Ended up giving them all away. I had a MESA 12ax7spa and it was identical to a sovtek 12ax7wa tube I had. (don't care for them either)
YOu can use JJ's if you go with a 5-6 range though.
Quote from another forum: "they're actually a variety of sovtek, svetlana, SED, EH, and chinese... been that way for a while. their offerings change occasionally, but there's usually some mixture of tubes from all or most of those sources available across their range of tubes. "
I can't say how accurate this is, but I do know that MESA does not make tubes themselves.