Like all things, components, speakers, room need to be tweaked so that optimimum performance can be acheived.
I have no problems at all with my SHL5 producing air, detail, soundstage, etc... if ever to nitpik the shl5, i wish it was more dynamic without giving up the fullness, i wish it can go lower in bass and slightly tighter. And a little (just little) refinement in the highs. But other than that, I can just live with them as is.