Synergistic Research MIGS

I use them under my turntable, preamp, and power conditioner, the effect is easy to hear and very positive. I guess its a system thing. They were not great on a tube amp I once had, but a must on front-end components. IMHO.

I use them under most of my equipment.

I've had mine for two years and think they make a difference. I don't have a quality rack, so that might be a factor in your experience.

Bjesien, that's interesting that you say they help you then. The MiGs couple your device to whatever it is sitting on, so I'd think that if your rack is prone to vibrations, the MiGs would actually increase the vibrations traveling into your system. But, if your ears are happy, that's what counts.