Townshend platform under digital component or amplifier ?

You can't isolate speakers because you can't isolate sound. Assuming your speakers are on the floor, if you have a resonant floor and the speaker excites it then you have to dampen the floor with carpeting and/or stiffen the floor. 

Subwoofers that are not balanced have to use spikes or they will start walking. Balanced force subs you could put on roller skates and they would not move. 

Putting isolation platforms, most of which do not work, under anything except turntables is a silly proposition based on lay instinct which is usually badly mistaken. But, it looks cool and that's really what it is all about. The two isolation platforms that actually work are the MinusK and the Vibraplane if you need one for your turntable. 

Good for you building your own speakers! Check out the new DEQX Pre 8 digital preamp. It has a 4 way digital crossover in it, totally programable for xover points and slopes. Could be the best thing to happen for DIY speaker builders, instant perfect crossovers. 

A local audiophile with Gaia pods, Townshend platforms, and other isolation tweaks has recently tried double yellow dot squash balls under some equipment with good effects. This is a much less expensive experiment than the platforms. Maybe too crude for you, but once they're half squashed, they're barely visible.

https://forum.audiogon.com/discussions/townshend-audio-podiums-the-full-review
https://forum.audiogon.com/discussions/townshend-audio-podiums-current-owners-opinion-on-the-merits-of-this

 

@hilde45,  yes good old squash balls which I have tried long ago and work surprisingly well. I found that depending on the load they carry the performance varies. If you're lucky and the combination ends up with a low enough resonant frequency then all well but if the component is too light then weight needs to be added which is a bit hit and miss.  I recently placed some unlikely looking and inexpensive Vibrapods model 1 under my 'The Truth' line stage and am now enjoying a much cleaner sound particularly the removal of some annoying sibilance. They come in 3 different weight ranges.

I was hoping to save lots of juggling of shelves by someone's experience claiming that digital components would provide the most benefit for example. Well will just have to try the platform under different components. My feeling is CD or DAC may provide more improvement than amp because of the sensitivity to vibration of the clocks. When time permits I will find springs that will resonate at about 3 to 4Hz like Townshend's do for my speakers. Not difficult to DIY.  No spikes for me🙄

@akg_ca, Thanks for the links. I enjoy Beekhuyzen, he's a bit dry buy no BS. This subject is almost as misunderstood as acoustics and cables LOL