Thanks guys. I noticed last night after playing 8 hours or so that the mid did seem to tighten up, or become more focused. Now they have been playing nonstop for about 22 hours, and really sound great. Granted, I do expect them to sound great, but I don't think I am fooling myself into thinking that. Right now the SPL is in the high 70s, but it seems louder. That was one thing I noticed about the original S5. The louder they played, the better they sounded. The MK2 seems to bring that ability down a notch on the volume scale, which is a good thing.