The OP's Butler Audio amp is not a full tube design. I believe it is solid state with a tube input stage. Therefore it will not necessarily need a speaker with a flat impedance.
Finsup, It sounds like you are not happy with the sound at present. There are allot of reasons why that could be. If you could explain more about what you're not liking and maybe some details about your room dimensions maybe someone can give you some suggestions.
Finsup, It sounds like you are not happy with the sound at present. There are allot of reasons why that could be. If you could explain more about what you're not liking and maybe some details about your room dimensions maybe someone can give you some suggestions.