What isolation feet under your amp with great result?

I've recently been replacing my feet under most components with platforms after much A/B testing.  Using a Symposium Ultra platform under my amp with great results. 

@ebm

SYMPOSIUM ULTRA STEALTH with copper spikes(amp stand) with CRITICAL MASS CENTER STAGE 2 1 1/2 inch feet for best sound.Get them together ASAP Nasaman!!HELLO!!

I have something similar that works well - my amp sits on a Symposium Ultra platform which is supported by a Solidsteel amp stand (with spiked feet). I’d be curious of the incremental gain to be had with the Critical Mass Center Stage footers. Although for $1,000 I will likely never try it, especially as I’m pretty happy with my amp setup. But good food for thought!

Honestly, people should give more thought to using platforms (including simple wooden ones) under their amps.  Much better sonics to my ears than feet.

@mamothguy54  

three easy payments, I believe that ebm is describing to use the Critical Mass Center Stage as footers under the amp and, thus, between the amp and the Ultra Stealth platform.

That makes sense.  I've spoken to Peter before and in fact he convinced me to try the Ultra under my amp.  I may give the Rollerblocks a try.