There was a data point in HTF too. Dude with a Denon 3802 or 3803, added an ICBM. He actually found the same thing. Signal to the sub was "out of phase" between the digital crossover in the receiver vs the ICBM.

Yeah, you can move the sub around, but that's not practical. If the 950 did have a distance (delay) setting to the sub, that's where the solution would lie. Or even a setting in the 950's software for polarity to the sub (my Sony TA-E9000ES had this).