Being in my 70s and having gone to rock concerts and having front row or very close seat...like Black Sabbath 1972 the old Academy music on 14 st NYC....I never noticed the changes...
I changed a Tube and…
I liked it!
Have a Rogue Audio Cronos mag lll bought it years ago as original Cronos Mag sent it in last year for the upgrade to lll . Never changed any of the original tubes .
The amp was lightly used due to my changing amps like regularly. Decided to stick with Cronos and and have really enjoyed it .
Playing vinyl for the majority of time and seem satisfied with Triode mode . Amp runs perfectly no noise at all but thought about all the threads regarding tube rolling especially the center 12au7 .
pulled out the stock JJ and found a Genalex Gold Lion ECC82/B749 (12au7) bought them 7-8 years ago .
Put the GL into center position and was thinking “am I going to really hear a difference “??? Figured I listen to a few LPs and maybe I’d notice something different good or bad Maybe ? after all it’s just one tiny tube !
Well I was blown away !, 30 seconds in listening to “two of a mind “ Desmond /Muliligan things just got a whole lot more musical 🎶. Hard to describe everything seemed improved , midrange was wow ! Soundstage was better , etc .
Went to another familiar favorite Grant Green “ Idle Moments “ Oh yes the magic is here too
Is this even possible or am I under a placebo delusion lol
Now I’m really wondering what about the other 2 12au7’s and even the 2 -12ax7’s
what else am I missing ?