So much to respond to but I'll only address two things.
1. You do realize that the isolation i.e. shock and impact methodology you follow is kinda' all over the map, right? For example. For that component do this, for this component do that, same for this weight category vs that weight category, springs here, absorbers there, etc. all resulitng in better here, worse there, 2 steps forward and 1 step backward, pros and cons, ad nauseam. Oh, and for all the unwanted resonant energy that still slipped thru the cracks, your soft rubber objects convert those nasties to harmless heat. Serously? Isn't this strategy a bit of a bottomless and nebulous rabbit hole? Is that any way for an appropriate methodology to behave?
Answer me this. Do you see any similarities between your strategy and results here and the strategy and results of those who are convinced the room (including aftermarket acoustic treatments) is THE most important component of any playback config?
2. Of the 3 primary sources of unwanted vibrations, you and perhaps everybody else claim that floor-borne vibrations are your system’s biggest enemy and secondarily presumably air-borne vibrations, right?
To show how little floor- and air-borne vibrations impact my (and your) system’s resolution I’ll list just few items that contrast your claims…
- I’ve two 15-inch subwoofers solidly anchored to the sub-floor via my custom points.
- My custom racking system is solidly anchored to the subfloor also via my custom points.
- Both subs’ nearest anchoring points are probably no more than 20-inches from my rack’s closest anchoring point i.e. where my points protrude solidly into the sub-floor.
- It’s entirely possible two or perhaps all 3 objects are sharing the same sub-flooring plywood panel, perhaps even sharing the same floor joist or 2.
- I often times listen near perceived live performance volume levels.
- I’ve no rubber or other soft compounds used anywhere that might compromise sonic performance. Only metal-to-metal interfaces. In fact, the metal-to-metal is so vice-like tight, I like to say they are just short of welding disparate metal objects.
All cardinal sins to the isolationist (shock and impact) crowd, right?
We know that floor- and air-borne vibrations fluctuate like a yo-yo as even your video showing your accelerometer readings confirmed that truth.
But if there was any truth whatsoever to your isolation/shock-and-impact claims, then why isn’t my system’s resolution also fluctuating like a yo-yo here? Why isn't yours or anybody else's?
IMO, isolation belongs entirely to the shock-and-impact side of the fence which has zero to do with managing unwanted resonant energy at our sensitive instruments. As such, I consider vibration isolation i.e. shock and impact in high-end audio and everything associated with it a four-letter word and never use the term isolation in a positive sense - not even with turntables. Simply because the methodology and its principles for which I adhere, apply universally the same to all sensitive instruments without any consideration for any limitations whatsoever and without any cons whatsover. Oh, and the sonic results are also without limit. I'm guessing that's pretty much what one ought to expect when applying the appropriate methodology to the appropriate industry while staying within its principles.
If you’re listening via a mac and headphones, max volume should be most engaging and most telling.
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