Hi Todd,
My wife and I both agree that the people below you will want to pound the daylights out of you
. An EP600 (and even a 500 from what I've read) is like hell unleashed and nothing can stop it.
I have my 600 in the basement. Between it and my upstairs I have 9" fir floor joists, 7" of Safe n' Sound mineral wool acoustic insulation made by Roxul and 12' sheets of 5/8" gyprock that is glued and screwed to the joists. All of my walls are also 5/8" drywall that are rock solid. When I am watching movies, the whole house shakes. You can't escape the 600 even when you go out into the yard.
You can put a perfect acoustic insulator under the sub but that's not where the majority of the sound energy is radiated from. It's from that big, silver eye and that huge, gaping maw
. You'd have to wrap your whole room with the insulator to have a fighting chance. I really believe there is nothing you can do practically. Low frequencies are a nightmare to insulate against.
