I had a Mark III (just sold it this week) and now have a Studio Pre with Mesa 50/50. The cab I have been runnning through is a custom made 2x12 cab with one Weber Blue Dog and one Weber Silver Bell. My tone sounds great but I feel as if these speaker are not giving me as heavy a crunch sound and chug in the bottom end as I would like. My question is, can speakers make a difference on perceived gain? Would say a V30 be a better speaker for heavy music over the Webers?