I've got almost nothing coming through using the 950's test tones with the other speakers responding very well. I have calibrated this system numbers of times before and though the sub test tone never jumps out like the others, at least I could hear/feel it. But not now. Maybe I need to take the sub over to my dealer tomorrow and see how it sounds there before I make myself too crazy. That at least involves the smallest amount of un-wiring to see if the problem lies there.
Hope it's not the 950. Funny how LFE just stopped responding. I even swapped the LFE RCA connector and same thing is happening.