To see if it’s the Calypso, why not turn on the system except the Rhea and unmute it. Any tube rush would be coming from the Calypso. I owned a Rhea and suspect that it’s the culprit since it’s fairly picky about tubes. The other thing to try is to flip the right and left channel tubes one at a time. The process is a bit tedious but you’ll find the bad one.
Getting V1 & V2 in the Rhea quiet enough is tough. I got tubes for those two positions for both my Rhea and IO from Andy at Vintage Tube Services. I can’t recommend him enough and he’s very familiar with Aesthetix products. My preference for tubes in the Rhea is vintage EI’s in V1 & V2 positions with Telefunken’s for V3-V5.
The key tube to get good sound out of the Rhea is the 6DJ8/6922 which if I remember correctly is V5. When I first got my Rhea, I rolled in Tele’s, Mullards and Bugle Boys in the 12AX7 positions with fairly poor results. I had left the stock Russian 6922 in place while I was doing this. On a whim, I put in a Tele 6DJ8 in place of the Sovtek 6922. Wow – what a difference that made. I was ready to sell the Rhea and write it off before I switched the 6DJ8 but ended up keeping it until I found an IO on the used market.
Getting V1 & V2 in the Rhea quiet enough is tough. I got tubes for those two positions for both my Rhea and IO from Andy at Vintage Tube Services. I can’t recommend him enough and he’s very familiar with Aesthetix products. My preference for tubes in the Rhea is vintage EI’s in V1 & V2 positions with Telefunken’s for V3-V5.
The key tube to get good sound out of the Rhea is the 6DJ8/6922 which if I remember correctly is V5. When I first got my Rhea, I rolled in Tele’s, Mullards and Bugle Boys in the 12AX7 positions with fairly poor results. I had left the stock Russian 6922 in place while I was doing this. On a whim, I put in a Tele 6DJ8 in place of the Sovtek 6922. Wow – what a difference that made. I was ready to sell the Rhea and write it off before I switched the 6DJ8 but ended up keeping it until I found an IO on the used market.