You didn't find the 36db per octave slope a little cold? I had previously had a 800prs, and I had the sub stage on 30db, but 36 on the p99 is so precise it takes a bit too much warmth out for my liking. I cranked it back to 24 at all points except the the tweeter low pass, which is set at 36db. That makes such a huge difference and reels in a lot of the harshness that comes with some tweeters natural top end roll off.

Does the auto EQ effect any X-over network settings?