Wasn't that popping something that was fixed in a firmware update? I have a 705, and I remember a big stink about that and installing a firmware update. You might want to check AVS about it.
Originally Posted by 95 Silver TA
Popping sounds like its something different than the rattling I had. I know that some Receivers like my Onkyo 805 when set to source is set to bitstream has had issues with causing speakers to pop including the sub. Maybe your receiver has the same issue. My BR/DVD player is set to PCM not bitstream so I dont have that problem. could be worth a check.