Re sub crossover. Yes, set on sub itself. 140 was as high as it could be set. I have all other speakers set at 120 but have seen AVS posting where a suggestion was made to crossover the C at a higher point than L/R???? I assume that logic would be to make better use of the sub as so much work is done by the C???
FYI, my 1070 is from B stock and seems perfect. My wife even likes the whole system once I got a Harmony 880.