dontsleep- Resonance Tuning is not only different from System to System but it is different from piece to piece within each Audio System so the key to success is experimentation.
For example on my speakers I first mounted them om 3/4" Granite slabs as an Energy Sink with no big change in the way they sounded. I then Decoupled the Granite Slabs with hybrid Sorbothane feet and the speakers sounded somewhat better. Over a year later I put a set of 3 BDR Mk 3 Cones under each speaker and those 35 year old speakers never sounded so good! I mean I could hardly believe that they were the same speakers they sounded so much better.
I have had other great Resonance Tuning successes like Sorbothane under each of the Digital Processors and DAC. I tried replacing the Sorbothane Decoupling with BDR Cones for Rigid coupling in the Digital front end and it sounded absolutely horrible as the sound became very etched and analytical.
I get by far the best sound from my Power Amp when it sits on a set of 3 BDR Mk 3 Cones atop a huge slab of Granite on the top shelf of my Salamander Archetype 5 equipment rack.
There's just no silver bullet when it comes to Resonance Tuning. You can get Sorbothane Decoupling feet fairly cheap. Rigid Coupling Cones come in many varieties and I've tried aluminum, brass, steel and the Carbon Fiber BDR Cones and none of them were any where near as effective as the BDR Cones because of their unique resonance characteristics.
All I can say is that careful Resonance Tuning can improve the sound quality of your Audio System on the same level as upgrading equipment would only it takes a lot of experimentation which does take time to get it just right, but if you want an $XX,XXX sound from $X,XXX worth of Audio equipment this is definitely the way to do it!
~Maxx~
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