I just got a quad album yesterday-Barbra Streisand's Stoney End. I do not have a quad system, but I do have a fair amount of quad records because of the remixes. I played it on my system which has the four main speakers, and a center. I typically do not use the center except for movies or when playing one of the only 5.1 music dvds I have. I thoroughly enjoy all four speakers working at once. It works for me.