I would nominate the Halcyonics active isolation bases. Two years ago I saw a picture of one at the Stereophile show in NYC. A demonstration of it effect on a container of water with people striking the rack below it. No ripples.
I inquired as to whether anyone had heard its impact on music and received a response from the importer. Subsequently, I got one and tried it. I had to have it despite its high price. In fact I bought a second one which is now used under my amp. The first is now under my transport and dac.
No one has an active isolation base as any motion in the vertical or horizontal directions is sensed and cancelled by the voice coils. The others uses springs, different resonant layers, or air bladders, all of which have respond frequencies. Were I able to afford it, I would have these units under everything.
I inquired as to whether anyone had heard its impact on music and received a response from the importer. Subsequently, I got one and tried it. I had to have it despite its high price. In fact I bought a second one which is now used under my amp. The first is now under my transport and dac.
No one has an active isolation base as any motion in the vertical or horizontal directions is sensed and cancelled by the voice coils. The others uses springs, different resonant layers, or air bladders, all of which have respond frequencies. Were I able to afford it, I would have these units under everything.