Mike
I have a second system with the Quad 21L2, Nad C325 BEE, Cambridge 640C CD player & Kimber 8tc Speaker wires, on the long wall in a room approx your size. Speakers are 2' from the rear wall and about 60" appart. Try to tilt them back to the top of the front screws, listen and lower a little at a time,see if that helps. Also while your away let the system play the Quads need time to break in.
Good luck
Mike
I have a second system with the Quad 21L2, Nad C325 BEE, Cambridge 640C CD player & Kimber 8tc Speaker wires, on the long wall in a room approx your size. Speakers are 2' from the rear wall and about 60" appart. Try to tilt them back to the top of the front screws, listen and lower a little at a time,see if that helps. Also while your away let the system play the Quads need time to break in.
Good luck
Mike