I have been using them under my audio equipment for several years and agree with all the positive accolades above. You simply don't want to believe that these things are as good as they are because they initially seem pricey but once you own them you will never remove them.
Ironically, I happen to have planar speakers which don't allow the actual platforms to integrate with them but I do use an SP101 under my stereo amplifier and several of the "003 & 004" models under a pair of mono blocs, my pre-amp, and my Dac (all are tubed units BTW)as well as the Sistrum spikes under my main rack... and I will be buying a few more for additional equipment. They are addicting and considered essential once you hear what they do. Highly recommended
