Elevating subwoofer about two feet off the floor

Glad to know I'm not the only one who hears a benefit from raising the subs.  

I have my 2 JLs on Auralex subdude stands. They are inexpensive and work very well. Bass became more defined and propulsive.

I believe the Harmon-Kardon paper on bass reproduction, the basis for the concept of subwoofer "swarms", recommends locating subs at varying distances from the floor, thinking of the room in terms of a 3-dimensional volume, not a 2-dimensional floor.

Okay, so I pulled the trigger and purchased an ASC sub-trap. Will report findings soon.

I have my REL S5 on a Symposium platform which elevates it about 3"..It sounds much better than when on the carpeted floor..