I have a set of HS8's in a 12X12 room(untreated). It is a block room with stucco inside and out. Great as a sound barrier on the outside but sound hell inside lol. I can generally get the top end mixed great, but the low's are a different story. I usually have to walk to the back of the room, in the corner and hear/feel the bass there. That will be amplified double too. Its a pain in the a$$ but its also a rental. To make matters worse, I will be adding a HS8s.