Bart, the .2 refers to the use of the new HK EZSet/EQII room equalization system developed by Dr. Toole's group. It allows two subs to be separately calibrated and equalized for all the factors involved. This relates to not only LFE(if and when present)but also the low bass redirected to the subs from speakers set "small". Although full details haven't been announced yet, it doesn't appear that it would be "stereo" in the sense that left bass would go to one sub and right bass(there's usually no such difference)would go to the other.
Room equalization is a developing technology, but at this time it appears that the HK and Audyssey(on some Denons)systems are the most advanced.
