Auralex SubDude HD - Subwoofer Isolation Platform

I use two of the smaller SubDude platforms under the speaker stands for my speakers. I don't believe that they improve the sound. They do, however, prevent sound from penetrating the floorboards and disturbing my downstairs neighbors.

@Rabbinoah,
What are the dimensions of the smaller platforms? I have looked around and can only find the 15x15 and those are much too large for the small floor standing speakers for which I would use the platforms.

I bought a bigger Auralex platform, then I just used a circular saw to cut it to size.

I use them as amp stands. They seem to do the trick!

I use the Auralex SubDude HD for the subs in my 2.2 channel majority music system and an Auralex Great Gramma for my HT Sub and they have really helped. More so in the HT system I heard improvements with the bass.

Has anyone used Auralex SubDude platforms under tower speakers ? How did they influence/change the sound or were there any benefits at all? Thanks in advance.