Hmmm, I don't have alot of speakers at my disposal. But here's my 2 cents. There has been alot of talk about speaker swaps on this forum. Even a current thread with webers. I personally tried webers( blue dog & silver bell 50w ceramic) in my LSC & V-30's also and was not happy. The C-90's still rule. And this was sort of the consensus on the board at that time. My 2x12 ext is a convertible, open/closed. I tried many combinations through open back, closed, V-30's, weber's and C-90's. Well, the ext. 2x12 closed back with the weber's found a home. In conjunction with the combo's open back C-90's, this sound was the biggest, fullest, & smoothest. The V-30's never pulled it off. That's what Mesa put's in their various 2x12 cabs.