Don't know if you want to add this as an LFE issue, but on another thread recently there was much discussion of AVR treatment of >80Hz information mixed into the LFE channel (Dolby Digital allows up to 120 Hz as a low-pass limit in the mixing studio, and some SACD/DVDs apparently have 'full range' music in the LFE) . Most if not all AVRs , when using bass management, combine and cross over the 'small' speaker channels AND the LFE channel before output to the sub. The 'upper' frequencies of the small channels are sent to the appropriate speakers, of course, but the 'upper' part of the LFE has nowhere to go. It's gone.
Now, this raises another issue -- do we really need, or *want* to retain that info anyway? Some have said that content above 80 Hz is rare in DD/DTS LFE channels (subwoofers set to reproduce it would become localizable too). Others add that the 'full range' LFE info in DVD-A/SACD isn't *meant* to be heard (which makes sense, as no subwoofer would be able to reproduce it anyway)
Still. Suppose one did not want to cross over their bass-managed system at 120 Hz (most people don't, unless they have TINY speakers). For example, if you have a THX-frioendly system, you want to keep the crossover at 80 Hz. The theoretically 'correct' behavior would be for LFE frequencies above that crossover point (ie from 80-120) to be sent to one of the other speakers (e.g. front L/R), rather than being lost.
here's an example of a thread where this is mentioned, though I know there must be others (I find AVS forum's search function to be all but useless these days)http://www.avsforum.com/avs-vb/showt...2&page=1&pp=60