Thanks for the response..the step up transformer is boosting the voltage to 220 so I guess it could be producing a cleaner 220. As to my memory of the prior amp. It had the exact same tube complement. The only difference is the first was a 110 and this one is 220. Your right it is difficult to draw a comparison, but the difference particularly in bass slam seems noticeable for whatever reason. I wonder if the 220 produced by the step up transformer is giving the amp better juice to draw on? Does that sound reasonable?
A question for technically astute
I have recently repurchased a Sophia Baby amp on A'gon at a really cheap. I suspect the cheap price the result of it being a 220 model. I think somebody move back from Europe with it. They bought a step transformer so it would work on 110. Anyway when I listened to it , I could swear that it had much better dynamics and slam than the first one I had. It seems like it can get much louder before compressing. The speakers might be a little more sensitive than before but not much. Is this my imagination or could this power arrangement make a difference?