I like Telefunken, Amrpex, or BRIMAR 12AX7's When it comes to the 5881 ( 6L6 ) I'm not a big fan of the Tung-Sol. Very sweet but at the same time, to mushy for me. I prefer some of the big bottle 5881's such as the GE or RCA. But it depends on the user I guess.....
But i agree with what was said above. Try changing the 12AX7 first.
But i agree with what was said above. Try changing the 12AX7 first.