Oh and to add about highs. Right preamp tubes and you can smooth the highs out big time even with the KT88s. When I first turned the amp on I was really worried about the "glassy" high end iKT88s are famous for. I thought the amp would be "bright". Well I am using JJ Ecc83s in the V1 and PI and I NEED the bright switches on and the presence up pretty high to get the tone I want haha. The JJs darken the amp up and smooth out the highs so when you add them back in with the bright switches it sounds killer IMO.