I can't answer your question directly, but from my experience with my Quads (2805) and 3 different rooms, placement is extremely important for smoothing out the bass.
You might try moving them out further from the front wall about 6 inches at a time and listening to see if the bass has improved.
Dave
You might try moving them out further from the front wall about 6 inches at a time and listening to see if the bass has improved.
Dave