When I purchased a pair of your Sophia Electric 9101 opts for my 2A3 amp back in March, I really didn't know what to expect. I have two other tube amps, a push pull and a SE. Being an avid stereo lover over the last thirty years, it has been my hobby to check out all the high end audio dealers regularly to keep up with the sound that I could never afford. The only downside to this hobby is going home to your own system and not be able to enjoy it for weeks until your ears readjust to your own system. When the highly recommended amp builder I chose called me to let me know that the 2A3 amp using Sophia Electric 9101 opts he had wired up for me was on its way and told me in his opinion it was a big step up quality and sound wise from the usual triode amps he builds using Hammond, MagnaQuest and Silk opts and that it was at least as good and maybe better than any he had heard using Hashimoto's opts, I wanted to get excited but knew better having been let down before! Well I am proud to say now that I have had time to go through most of my music collection I am still overwhelmed! I am hearing sounds and nuances that I have never heard on all of my old favorites. The clarity and definition in the music is amazing! It is so accurate and the sound stage is just like being there live. My modified Khorns have never sounded so amazing! I can't wait until I can replace my RCA 5Z3 rectifier with the Sophia 274 meshplate and then replace my vintage RCA 2A3's with the Sophia princess 2A3's. I am happy to say my new hobby is staying home and listening to my own stereo! THANKS So Much Sophia Electric!!! T.H. nw Okla