Auralex SubDude HT - Subwoofer Isolator 18"x22"

Amazing Product! Really helped my neighbours downstairs:)

Bought as a neighbour below had complained during movies. The Sub had been sitting directly on stone/concrete floors and reverberated through the walls and floor and could be felt even sitting on the sofa. Since buying, the vibrations have reduced massively. I no longer feel the bass only hear it which makes it arguably a tighter sound. As a result, it makes me more comfortable playing films and I have been able to turn the Sub up a bit. Maybe it could have been cheaper, but considering the overall cost of my set up, I considered the price to be a fairly minor investment. The most important thing is there have been no more complaints!

So it appears to do a fair job of dulling the vibrations which is good as I live in a top floor flat and like to play loud movies.However it is just a piece of wood covered in felt with a piece of acoustic foam stuck to it....do yourself a favour and save yourself £80, go buy the parts for less than a tenner and make it yourself.