I’m burning in a pair of EML 2A3 mesh tubes now for a monoblock pair I’m working on. Using them in a 20 year old Tektron TK2 2A3/50.
I’ve also got a pair of EML 300B tubes I’ve used for over a year.
Both sound awesome, the 2A3’s so far a little more “refined” but I’ve only got about 10 hours on them.
Can’t praise them highly enough. I think, for the price point, they’re one of the best deals going. And a 5 year warranty.
Someone mentioned SOPHIA tubes. I have a pair of 300b 2.5v Sophias mfd in 1972 that are still going strong. Great value for the money.