Auralex SubDudes Work!
I have 6 Auralex Sub-Dudes, 4 standard/smaller sized and 2 larger sized models. I use them under speaker stands, under a bass guitar amp, and atop a dedicated hi-fi isolation stand, upon which I'll place my new turntable. I also use them on my home-studio desk top, under powered monitors. I had purchased a set of Iso-Acoustic isolators for my new JBL LSR 5 monitors and found that I could NOT get anti-vibration results using them on my home studio desk top. In fact, my desk top vibrated and rattled as if there was no isolator under the monitors at all! My solution was to place Auralex sub-dudes, the smaller standard model, under the monitors and then put the monitors with Isolators atop the sub-dudes. The Auralex sub-dudes are quite effective. If you just want something to sit smaller speakers on, the Iso-Acoustic isolators may do the job, like any shorter, portable stand, raising/tilting the speaker box, but in my experience they are unimpressive at vibration control. On the other hand, the Auralex Sub-dudes actually work! If you can only afford ONE solution for acoustic isolation/anti-vibration, particularity where more rigidity is needed, like under studio monitors, I recommend the Auralex Sub-Dudes.