The sound you're describing is a sort of "nasal" sound, yes? Or is it more of being "surrounded by treble?" If it's the former, then I'll bet we have problems with the crossover. If the latter, then it may be your room. If it's the room, then every speaker should sound bad there. If that's the case, then check out the post called "Solution for raised wood floors and crawlspaces." It might give you some good ideas.