Another lost post....

Someone suggested room treatment, I agreed.

The physical speaker size isn't an issue; frequency response is. The room size and shape will limit performance;

Square room = peaking response in the lower frequencies due to two dimensions being the same (room nodes).

Small room = changes the frequency of the peaks above; smaller the room the higher the frequency, in a very large room the node frequencies are so low as to not be a problem.

Small room = first reflection points are closer and therefore reflected sound will be closer (in time) to the original, this will lead to a blurred image (soundstage).

DSP room correction can help with the frequency response due to room nodes but cannot change the acoustical reflective properties of the room.

All the best,

Steve.