Do you find it makes much difference , mines going on a second floor wood floor..
I bought it with the intention of moving the sub to a part of the room that is on wooden suspended flooring from its concrete location. For the time that the monolith was on the wooden floor, the resonance was terrible (1910 mid terraced house and creaky floorboards) - the bass was noticeably bloated, but that may have been down to the sub's location, but there was a definite unwanted resonance on the floor.
If i was in a flat it would have caused all sorts of problems. I then moved it onto the gramma and there was an improvement, the bass was isolate from the floor as its designed to do but it didn't completely remove the problem. But then again a thick concrete slab or marble would also help but again, I'd be surprised if it completely eliminated the problem.
I ended up moving the sub back onto the concrete extension of the room and it still lives on the gramma (as you can see from my pictures).
It will only help to isolate the bass from travelling into the floor so in short, yes, i noticed a difference when it was on the wooden suspended floor.
Sorry to ramble on!
Oh and having it on the gramma makes it 100 times easier to move the sub as you can drag it if you have carpet or a laminate floor!
