Footers for Esoteric SA50 CD-SACD Player

Frontier1-which audionotes? If they are silver (not copper), I would try swapping to a copper pair. Those are amazingly revealing speakers. I'm not saying that they will reveal the lack of warmth in the Esoteric, as it does not lack warmth, but, rather, the IC cables are rather lean.
I would also really try to use the balanced outs on the SA-50. Balanced does sound better on that player. Hopefully, your preamp or intergrated has balanced inputs? You should be able to get a pair to audition from a few sources.

I found the SA50 a little on the cool side in my system. swapped out my usual Oyaide Tsunami PC (used the stock cable from my PS3 which sounded pretty good..go figure!), put some sorbathane feet under and used a power conditioner to clean up the power supply. All helped quite a lot, especially the power conditioner.

The best is Still Point Compponent Rack (9 inch, 4 legs). A bit expensive but will allow SA-50 to show its potential in full (of course, coupled with high quality power cord)

Ever the iconoclast, I propose a completely different idea. . . rather than fiddling with support, it may be an interesting experience to load the SA-60 with a little more than 20Lbs of weight on top of it. Last Summer I made the experiment with an isolation platform for my Esoteric X-01 Limited. . . the platform turned to be extremely more effective in centering/filling the sound of X-01 when laying upside down on top of the player. Not sure if the platform design had anything to do with the results. . . you may want to try placing one of your famous Canadian Rock Maple platforms on top of Esoteric SA-60. . . or one of your HRS platforms upside down on it. G.

I put an HRS M3 isolation platform under my Playback Designs MPS-5 for considerable added impact in the bass and a general clarity enhancement. Not cheap, but very effective for the better units, such as your Esoteric.