I tried mullard and telefunken 12AX7's and settled on RCA 5751 all nos tubes. I also tied the nos sylvania 5751's they were a little noisey, ended up using them in my Rogue M-180 amps in place of their 12ax7 input tubes. Joe's tube lore on audioaslyum is very helpful except unfortunatly the prices are out of date. The good news with the Calypso is there are only 4 tube.
best tubes for Aesthetix Calypso
I have read several reviews, but know to come to this source for the BEST info. I'm going to re-tube my Aesthetix Calypso. It's tube compliment consists of 2-12AX7's and 2-6922's. I prefer deep, smooth, but quick bass and nice clear mids and highs. (guess everyone does) I have read about 7025's, Cryoset tubes, Mullard's and Telefunken's etc. Which are my best play? It may influence your answer, so here's the rest of my equipment: Lyra Delos/Koetsu Urishi Black carts, ARC PH-7 phono stage, Calypso line stage and Pass 100.5 monoblocks. They are all pushing Wilson Maxx II's.