So I can get my hands on an old Johnson Millennium amp made around 1998. It has 2 Vintage 30's in it - UK made I am 99.999% sure as Celestion didn't move off shore yet and they are for sure original equipment. I'd like to maybe throw one 8 ohm V30 in my DSL40CR combo and the other in a 1x12 cab - closed or a 3/4 closed Mesa I have. To do this I'd have to run them in the 2x8 set of output speaker jacks, which would be a 4 ohm parallel connection. I know most will say as long as I have speakers and amp matched up ohms - wise there will be no difference in sound. I am just checking to see if there are any red flags, I don't want to take any Marshall goodness from the amp.