As the system is more for TV/Movies than music the crossover point is set at 80hz as per the THX recommendation. I use vintage Polk Audio Monitor 7's for the front R/L capable of playing much lower. The -3db is 35hz. I have tried them at all of the crossover point options including running my fronts as large and prefer the result crossing at 80. Tone controls set to flat

For TV and Movies it works great. The bass cabinet disappears into the room just like it should and the night mode works without sounding like I threw a wet blanket over the speakers. It is working well and we are happy with the results.

Until I switch it over to the stereo mode. In the stereo mode the 975 defaults to front R/L + SW crossing at 80hz because that is where I set it during set-up (after some tinkering because I did try all of the available settings before settling on 80). When listing to music the transition between the Polks and bass cabinet can be heard clearly as it is not a smooth transition. It would be nice if the settings for the stereo mode could be adjusted independently of the settings for TV/Movies. If audio settings were independently adjustable then the icing on the cake would be to let me have control over the slope as well. If I could slope the crossover point down at 6db per octave instead of 12db the musical transition between the fronts and the SW would be smoother and closer to transparent.

For TV/Movies a 6db slope of the crossover would most likely have a negative effect.

EQ is different discussion but one worth having. Instead of something along the lines of Audyssey include parametric eq. (no idea how many bands would be needed but would be easy enough to determine) Set-up then could consist of plugging in a mic to the unit and setting distances and levels and I have no personal objection to this being done manually. Others will not want to do anything in a manual mode. Once the levels and distances are set have the new pre/pro display a RTA graph of the room in the set-up OSD. With parametric one can set the iso center and width of the filter to adjust as needed. This process could also be automated but I would still want the option of adjustment.

Simple