New to this discussion and have a question. My 6 month old A6A is doing something I can’t quite figure out! With my Xfinity and Apple TV hooked up, I can see and hear the subwoofer working (7.1) With my Panasonic UHD blu-ray on, and depending on the disc being played, some discs show the sub on, some show it off?! For example, when I load the Eric Clapton UHD disc, the preview to the disc has the sub working, but when I select a song and play it, the sub turns off. The copy of the Christmas Vacation in UHD, the sub is on the whole time, however, Wonderful Life UHD, sub off (while reading the disc, the sub was on). Any ideas?