500,

That was my understanding as well. I think the idea is that the actual soundtrack (used in movie theaters) utilizes front tracks modified to make up for the fact that they must be projected through the screen to the audience. The THX Cinema mode undoes this (for the fronts only) because home theaters do not generally project through a screen.

I thought one explanation might be that the phenomenon suggested by Axiom board members is not actually true.

I thought another explanation might be that the DVDs themselves are recorded with the modification undone, so that THX is now giving a double whammy.

I thought another explanation might have something to do with the suggestion, made on non-Axiom boards, that Axiom has put their money in the upper ranges, so that when these are clipped, the limitations of the speakers are made more evident. Does that make any sense? Of course, this then would apply to all such speaker designs. (Which I think are called "bright"?)