I'm no audiophile here, but with the onkyo 3 position auto-cal, so far seems pretty good. Still playing with sub, though. Also did the sub crawl, with a Chris Brown cd (not my music of choice but worked for the bass), and it sounded pretty much the same all through-out the room except for being right by the sub. I also don't have a small or large setting with the 606, or I haven't seen it. But I am able to change the low freq. settings. ? is do I do this on both the fronts and the center?

Hope to gain a wealth of knowledge and maybe use it.