Primaluna and Rogue

use gloves when handling any of the tubes , large or small
The Magnum should have the KT90 powertubes which with the larger power supply allows for the unit generate 90 wpc - these are tubes that get biased . The small tubes are all signal stage tubes

Electro-Harmonix KT90EH is the power tubes that came with the Cronus. The pre-amp tube is a Sylvania. I can't tell what the other two 12au7's and 12ax7's are right now without removing them. I know they're whatever came with it from Rogue. All their web site tells me is that they're upgraded.

I must say, I'm rather impressed with the sound. I began playing music about 10 minutes after I started it up. It sounded pretty good. About 40 minutes later, I was almost in tears listening to the Pink Martinis. I was puuling out CD's I haven't played in years and they all sounded excellent.

Congratulations on your new amp !! I have been absolutely delighted with my Cronus for almost two years now, and I'm sure you're going to be very happy for a long time. And, like I've said here before, Mark and Nick at Rogue Audio are great guys, and are always available to answer questions and give advice. Don't be afraid to give them a call. Good Luck, and Happy Listening !!

Try some Amperex 7025's in place of the 12ax7's.Very nice sounding tube.

Donjr when they shipped me my Magnum all of the signal tubes were Sylvania's , might want to just give them a call and ask