I think the foam is the main problem. It simply won't do anything to fix the lower frequencies and it will kill the upper frequencies. Look into some real bass traps and diffusion. Use a minimal amount of foam if you must. If you put enough bass traps in that room you'll be much happier. Good luck.
Speakers & the room
After a couple of years playing around with different speaker positions I came to a conclusion.My room sucks..No matter what I do I can't get it right..My room is about 15x24 with 3 different ceiling hights..My speakers are about 5' from the back wall and 3' from the sides.This seems to be the best but it's so far off from what I want.I have moved my listening position everywhere also.If I sit at the same distance away from the speakers as they are apart my imaging is great but I'm missing the bass and the extreme lows.And of course if I move my listening position farther to the back wall i get great bass but the imaging vanishes.I hear very large tonal changes with even small changes in my listening position.is my room doomed or is there help?My speakers are Artemis/EOS full range with tons of acoustic treatments from auralex.Any help would be appreciated..