Since Tung-Sol 12ax7 is the manufacturer recommended tube for it, I've put 3 of these into my Lee Jackson GP-1000 and I don't think it can sound better than that! Alexi Laiho all the way!
Go for the Balanced selection - it's worth it, especially for third party, non TAD tubes!
Overall, a very live and good sounding tube. It sounds a bit dark while clean and tends to sound with too much high end under high overdrive settings but, definitively a good new production tube.
Probably, I prefer the Sovtek 12AX7 EH, because it sounds more silky and balanced to me but, my amp is bright by nature.
So, I guess this tube will work really good in slightly darker amps.
you have to buy this tube because they reveal more than anything we heard in the music its like a ghost we listening something before isnt there thank you