Awesome comment above especially middle paragraph where you talk about parts.
You have a great space and all the details related to those components you have. So much knowledge about all that goes on. Especially biamp mixture of tubes and solid state. I became a member of the exclusive fraternity and while I wanted to do it with my existing solid state mono amplifiers by adding a couple tube amplifiers it was a bit of a challenge for me. So I purchased a pair of McIntosh 901s which seem to do what I was looking for while sparing me of all the aggravation of doing it myself but you seem to have handled things well. I added 4 telefunken 12ax7 nos tubes at the top of the food chain and now debating whether I want to replace eight 12at7 jj tubes with Telefunken and leave the remaining 16 kt88 jj Power tubes alone until they die. Lots of tubes but some comfort that the tele nos Will live a very very long life. Interested in any thoughts you might have about whether the 12at7 tubes are worth changing out.
Thanks