Elevating subwoofer about two feet off the floor


Acoustic Sciences Corp recommends elevating the subwoofer about 2' off the floor http://www.acousticsciences.com/products/subtrap

see photo in link above ... has anyone tried raising their subs that high off the floor? Did it sound better?
tweaknkeep
I guess the only way to know for sure is to buy a pair and try them with subwoofers. Who know what kind of damping 
Actually, the question is whether raising the subwoofer off the floor about 2' will make it sound better. No need to purchase the bass trap that ASC is selling.
Another case of selling people something they likely don't need…bass naturally bounces around the room, and that's a reality that I personally don't mind as it sounds natural to me. If it doesn't, I turn my subs up or down a little.
Tweak, the bass trap has damping materials, which I believe would cause it to affect the sound, rather than simply elevating it.
My REL's are down firing. I've always found that they sounded less boomy when I moved them out of the corner and more into the center of the room. They tightened up more when placed away from any walls, though it requires a bit more volume in those positions.

Then on a lark, I turned them upside down. Yes, I did place a cutting board on their upturned feet, figuring they would need something to simulate a floor. That's the ticket. tight, precise, invisibly integrated. I heartily endorse anyone to try this and see if it works for you.