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I personally use symposium ultra shelves and solid couplers ... Larryi
..i would put the star sound technology 'sistrum platforms' ... Calloway
Cheap yet highly effective machina dynamica promethean sprin ... Tweak1
I first heard of this one man company via a ps audio newslet ... Viiu
Many of the products mentioned are indeed quite good from a first hand usage perspective (SRA, GPA & Symposium being three audiophile oriented brands for which I do have some affinity/bias). Machina Dynamica's Nimbus is certainly a cut above the Promethean mentioned -- however does have mass constraints imposed due the nature of the air spring-based design.
In terms of cost-no-object I must qualify that a typical audio style rack in general is a logistical compromise between performance, aesthetics & general space constraints. This is in a way no different to having to share outlets from an electrical perspective.
If given an opportunity for an optimal configuration it would consist of a composite of dedicated high mass / active isolation stands for the most sensitive source components & an advanced multi-tier solution for the remaining portion of the system. Do keep in mind for larger reference systems tertiary sources aren't used in parallel so it's far harder to justify a dedicated means of isolation. Plus it saves some space in the long run.
Following with this theme is relying upon the existing room structure to augment the isolation method (alcove or partially enclosed area). The simplified 'room-within-a-room' principle can be used to decouple the equipment from the surrounding area yet still maintain a somewhat amicable appearance. Some things quite frankly are easier to avoid entirely. An example being some time back I loaned a Vibraplane to an associate only to discover his listening area was directly adjacent to the primary HVAC.
Symposium (with Billy Bags+filled stands), GPA & SRA do fine job of providing a high performance tiered rack solution. In terms of active platforms as always the Vibraplane seems to come up in audio related discussions. If you do any research you'll quickly see that a single high quality active isolation platform can commonly exceed the costs of some of the most esoteric racks available (albeit keeping to the theme of costs no object).
As a final commentary if you're considering a significant investment I'd encourage you to work with a party who can provide a sufficient 'try before you buy' policy. Each of our environments are unique as are our components (and personalities for that matter). The final outcome may certainly require a hybrid approach to get things dialed in where you want them to be. Again depending on your budget it's not always necessary to simply buy off the rack if you have a more specific requirement.
Some of the individuals best known for their room tuning solutions also have exposure to some very good mechanical isolation products. Ultimately tuning in this well rounded fashion seems to turn out the best.
Bish (System | Threads | Answers | This Thread)
Hi, i went from a arcici suspense stand with symposium ultra ... Jfrech
For active isolation (ie. halcyonics), is there a benefit to ... Rtn1
Be careful, there isn't a "one size fits all" isol ... Jeff_jones
In my experience air isolation is not the valhalla of isolat ... Dazzdax
I can only add a few comments and perspective from what i ha ... Rstan
Add critical mass platforms to your inquiry. Rhythmace4218
The copulare equipment racks are considered exotic and have ... Audioquest4life
I have one halcyonics platform and two critical mass grand m ... Willster
I have never used an active platform device. having read som ... Theaudiotweak
I hope an engineer can chime in here, but i'll take a shot a ... Rtn1
Prospective buyers of vibration control products should know ... Equa
Our nimbus and promethean isolation stands incorporate " ... Geoffkait
I have no doubt on the ability of cones/spikes, elastic inte ... Rtn1
I disagree that a rack is designed only to isolate component ... Larryi
Any passive design will have a resonant frequency, below whi ... Willster
Rob rtml, i see in your posted system here on these pages t ... Theaudiotweak
i've used an hrs platform, stillpoints cones, finite el ... Isanchez
You might look at a company called minusk technology. they b ... Lapaix