References available on real life room "tuning"?

Mr N: Yes, near-field listening could be making all the difference. Especially in a small room. Also, you may have a null(narrow enough or at a low enough frequency), against that back wall, that doesn't affect your perception of bass reproduction. (http://www.realtraps.com/art_small_rooms.htm)

Rodman99999,
Thanks for the clarification. My speakers "only" go down to 40Hz so that probably helps as well since I'm not reproducing the really deep bass notes.

All the best,
Nonoise

I can't get much more solid footing unless I redesign the Paradigm M7 bases. They're sitting on a brick fireplace hearth, about as solid as can be.
I think the room layout situation is horrible but it is what it has to be. Adding and moving things to improve certain areas will have to do. I notice no pictures posted on this forum so I'll guess it's a no-no? I'd post a pic of the room otherwise.