By Wilde Becker. Speaker Stands. At Tuesday, July 30th 2019, 19:04:06 PM.
One way to improve the situation is to add mass by means of a platform fixed to the top surface of the foam. Primacoustic do this in their Recoil Stabilizer by using a very thick steel slab with rubber matting on top, while Auralex and other companies use MDF topped with dense rubber on their more up–market platforms. IsoAcoustics take yet a different approach, by using a frame made from rigid components joined by resilient isolators.
To sum up, the platforms with a heavy plate of some type on top are the most effective, though you can add mass very easily to any type of support by using floor tiles. Similarly, the more massive and better damped a speaker stand, the less vibrational energy is likely to make it through to the floor and less the stand itself will vibrate. Compared with the cost of speakers, adding suitable stands or platforms is relatively inexpensive, yet it can make a very worthwhile improvement to the overall sound quality!
And stands are especially helpful in the low-frequency area, as this part of the frequency spectrum is omnidirectional and therefore more sensitive to surfaces nearby than the high-frequency area.