Let's face it - if you are into full range music (and who isn't?), small rooms are tough. And frankly, square rooms just suck unless they are very large. Based testing and experimentation in my own lilliputian space, I will take (for example) a 12x9.5 room with good dimensions over a 12x12 room any day. I was never able treat a square room well enough so that I enjoyed listening in it. But that's just me.
My second point regarding wall proximal speaker placement - to each his (or her) own. In a 12x12 room, how far apart do you intend to seperate the speakers? Let's assume a modest 7'. So unless you are going to listen in the nearfield position (always an option) you are going to be approx. 1' off the back wall; probably a little more. If your room is multi-use and you are mostly watching TV that's OK. For critical listening, maybe not.
Try a variety of suggestions and see what works best for you.
My second point regarding wall proximal speaker placement - to each his (or her) own. In a 12x12 room, how far apart do you intend to seperate the speakers? Let's assume a modest 7'. So unless you are going to listen in the nearfield position (always an option) you are going to be approx. 1' off the back wall; probably a little more. If your room is multi-use and you are mostly watching TV that's OK. For critical listening, maybe not.
Try a variety of suggestions and see what works best for you.