I have yet to put a small couch in room...so that might help with some of the bass boom...and yes this to me is as much a near field experience I ever had to do.
bwaslo i think that i will try a diffusor on front wall for giggles...as well as some smaller absorb panel(s)...i dont think they do (diffusor) deaden either...so what the hey...i like the back (door) idea too