What isolation feet under your amp with great result?

@ericsch I don’t remove the feet. I place the component directly on top of the EVA pad, feet and all.

3/4"MDF and casters.  My amps weight 85Lbs each.  The great results are not hearing me groan or pull a muscle while cleaning.
 

All my components rest on Machina Dynamica Springs. The science is sound, the result is amazing, and the price is right

@tweak1 , Geoff has been saying "mass on springs" for years, and after the past two months of trial and error I have ended up with springs under my heavy speakers and amps.  The spring stiffness (i.e., spring rate), load capacity, diameter, and height are all important considerations.  I have used heat shrink to damp the single springs and even that was a learning experience wrt the size and thickness of the heat shrink used and how those factors affect the performance of the spring, as well as the need to put a hole in the heat shrink to prevent an air lock.  The heat shrink also improves the look (pics on my system page) and prevents scratching on the bottom of your components or the tops of your rack shelves.  I also have a bunch of Herbie's products here (Giant Fat Dots and Gliders) and based on my experience so far I would have a hard time deciding whether springs or Herbie's footers sound better. 

I like the feet these guys are making,  Turntable Phonograph Vinyl Record Player lsolation Feet – Mnpctech