[AlphaPie]

this room is small at 12x12. I running a Yamaha rx-a720bl and Polk speakers. I'm thinking about 2 or 4 12" subs, one on either side of the tv or on either side on the chair on the opposite wall.

I will most likely be building some diy subs for this, but I'm curious if 2 12" at 600-800watts would be enough for this room or if 4 would be too much..

 

[weaselfest]

I thing you really want 16 - 8" subs in that tiny room. Give your self a back rub with a drum solo.
Or say, "The HEILL WITH MY EARDRUMS" and find two 15" that work in small boxes and hit'em with a Behringer iNUKE each.