Hello, I have several tube amps, most I am selling. As a I await the arrival of the Ultra. I sit and think, I had origionally thought about running my new fractal through my JVM410 but the more I think about it. I really like that amp just the way it is. I have a couple more options. One is a Windsor head into a 4x12 and the other is a nice little Randall 1x12 combo that I keep upstairs. If I skip the preamp of the Randall and just use the power tube section and the Ultra, do you think it will sound pretty good. The Randaall has two NOS russian millitary 6L6 variants in it. I have had really good luck running the gt-10 like it. Anyway if you use a 1x12 with your fractal and have had good or bad luck, please let me know. thanks