I ended up with Tungsrams in all positions. E88CC (6922) and 12ax7's. I have been more than pleased with the overall sound and the preamp is dead quiet. The E88CC's do need a long burn-in of about 300 hours. The 12ax7's require far less. Many of the NOS Tungsrams require pin cleaning, as they come pretty oxidized. In my system, this combination produces tight, accurate bass, smooth top end, and superb inner detail. During the E88's first 100 hours, the sound changed pretty dramatically and I almost gave up on them. Glad I didn't.
Aesthetix Calypso, Tuberolling questions?
What results have owners of this preamp had with different tubes used. I'm running stock tubes into a pr. of Parasound JC-1 mono blocks now and the sound is very good. Would like to open up the treble a little if possible without messing up other areas. Any info on what people have tried and to what results would be of great help. Thank you