The sub should do fine sitting on the floor. LFE is very hard to cancel but you can certainly try it out with the floor discs or a piece of MDF cut to fit the area of the feet and thus you can reflect the sound waves out/up vs. having them forced into the floor not that I beleive it really matters much. LFE is like a ripple in a puddle of water and it just emminates outward in all directions, but worth a try.
Well today I was crawling around my sub re-routing a few cables and noticed that the sound from it was somehow being greatly attenuated. After some investigation I found that the carpet is deep and thick enough that the carpet spikes on my sub had worked their way deep into the piles and the sub driver was actually touching the carpet! So, I popped the hard floor discs under the carpet spikes and it sounds MUCH better now. And to think I was considering selling my sub and getting one of the new SVS PC12-Plus.
