all you need is the Auralex. the sub, including the feet, will sit on top of the platform. simple stuff. it keeps the sub from radiating onto the floor, which brings all kinds of issues, like rattling floor boards, etc. it works very well for me, i have 2 JL Audio subs that sit on the platforms.
subwoofer buzz - how to eliminate it
MartinLogan Dynamo 700w
At low frequencies, it vibrates, like it wants to fall apart. It does have a rubber feet, sitting on a hardwood floor, what could prevent it? Isolation feet? More rubber? Also it's facing the floor but can be turned sideways, would that help?