You raised an interesting point. Anyway, I first thought you said Audyssey said the sub level (channel) independent of the other speakers (channels) independently, that I disagree, and even in the link you provided, Chris said:
"@DUCLAIR: The level that Audyssey sets for the subwoofer will depend on where the analog volume control is set on the subwoofer itself. There is only one correct subwoofer level setting if you are interested in listening to the same calibration they use in the studio. So, if you turn down the subwoofer volume control then Audyssey will find a higher level setting for it. "
Now in your last post#78, you seemed to be saying Audyssey will "max out" the sub level one way or the other alone, and that I would agree even just base on common sense/logic. In my experience though, it would seem that Audyssey use some sort of algorithm such that if you turn the sub volume too high, at some point (say at or near the "max out" point), it would actually turn the levels up on the other speaker channels too. I would have no objection to that strategy and I really thought I had seen it before when I was playing with it everyday. I am just too lazy to try it again now. I cannot tell you this is the case with the older and lower XT version, as I have XT32 for almost 3 years now.