you could have correctly isolated your entire system for what you paid for your homemade devicesThe amount I paid for ALL my homemade solutions was 2/3 of the amount I will pay for these isolations pods...
But I also invest to controls my electrical grid and the acoustical field of my room …. All that for 2/3 of this money....
The most costly device I bought cost me 50 dollars (usb S.G. from hong Kong) after that shungite etc
Then for a fraction of the price I develop intervention in all 3 embeddings controlled fields...Then even if my mechanical isolation are not perfect they work great...I will recreate my system better in a year or 2 in an another house...( with spring under quartz bed for the speakers)
The acoustical field mods. are the more impactful of the 3 set of solutions for the embeddings.... :)