I just recently hooked up my Denon AVR-885S, the previous model. There's no auto EQ, but there is auto setup. I pretty much left the settings where the Denon put them, but I raised the sub level 3-4db. It did set the the sub distance much further then it's actual physical distance.
The one thing the Denon does with Dolby Digital, and does NOT do to DTS, is apply an automatic "Offset" to the center channel level to account for different mixing levels which could make the center "Hotter" than the other channels. It brings the center level inline with the other channels. When I switch between DD and DTS, the DTS center level is much louder. This could account for the perception that the center seems too quiet. If I hadn't read through the manual I'd have thought the same thing.
So far I am very happy with the AVR-885, which is basically a 2105 clone with a silver face.
