Why don't you look into the new Blackburn 12AX7's,. I found this write up and some responses posted in the other audio forum where the tube inmates hang out.
http://www.techtubevalves.com/valves/e813cc.php
I am interested as well since I have an Aesthetix IO Signature and would be willing to try the new Blackburns as well.
Ciao,
Audioquest4life
http://www.techtubevalves.com/valves/e813cc.php
I am interested as well since I have an Aesthetix IO Signature and would be willing to try the new Blackburns as well.
Ciao,
Audioquest4life