Mike, I prefer two subs, it solves a lot of issues and you get a more even bass distribution throughout the room.
GC, The receiver is Yamaha RXV-2600, Denon 1920 DVD player, Sony 400 disk CD changer, and Behringer DEQ24/96 PEQ inline with the subs. Yes I love 2 subs, I would never use just one sub again.
Major, it stays put, It has rubber feet on the bottom
Oh and I forgot to add the Track lights are on a remote dimmer