So after a few weeks of playing the 20C (my first Marshall) I was having a few things to work out. First of all a little backstory on me, I have played mostly F style amps since the 80's and mainly played 6L6 and 6V6 amps. Buut I did mod and play a Blues Jr (I know, I know) for a few year and had other amps along the way - Vox, Roland, Vox, Ampeg... But any who. I knew I liked the Origin but I knew I needed to learn how to utilize it best. So just learning Marshall front pannel EQ settings, took a bit of adjustment. But I think I have the hang of it now, but I was having some issues with microphonic tubes, so a bit of swappin ( just pre amp, still need to order power tubes as I do not have any EL's around) and much better. The original pre amp tubes are just junk, picking up crazy sounds from my hand moving on the bridge and conversations of people on phones passing by, too bright and brittle, the controls on the guitar not being very usable. Now things are much better, the too trebly ice pick is gone, the noise floor is way lower and the amp is so quiet now. The controls on the guitar actually do something and have range. I have never seen such a drastic change in just pre amp tubes. Then the speaker, while a fine sounding speaker the V type is just not what I want in a Marshall. So playing through a few cabs I have I landed on the Eminence GB128, much better. So all in all I now have the hang of it and the amp sounds freekin killer. Here is to the learning curve and some hints from yoos all, thank you .