Click title to read one, or click date to read all below it.
12-14-05
I am much in favor of critical mass systems. bests black di ... Siddh
12-14-05
Siddh, how long have you had your cms stand, what do you hav ... Essentialaudio
12-14-05
I would strongly suggest grand prix audio. Jtinn
12-14-05
i use brass mi-rollers, right up there with the best on th ... Tin_cup
12-14-05
Check the finite elemente pagode masster reference. great en ... Seurat
12-14-05
To answer your question clearly: yes, an isolation device wi ... Tobias
12-14-05
I use a non-audiophile rack, too. depending on the configura ... Tvad
12-15-05
I second jtinn. try also apex & formula shelf!! Edzard
12-15-05
For me, the choice wasn't even close. i opted for silent run ... Hooper
12-15-05
I have three critical mass bases. two, which i have owned f ... Siddh
12-16-05
Hooper: what is your experience with the grand prix audio fo ... Jtinn
12-16-05
most of the isolations devices that are being discussed her ... Adog
12-16-05
Adog: "they all pale in comparison when compared to&quo ... Jtinn
12-17-05
I am not "hear" to diminish the merits of any of t ... Adog
12-17-05
I'll defenitly second the finite elemente suggestion... i ... Ozy
12-18-05
Jtinn: good question. at the time i was making my isolation ... Hooper
12-19-05
Hooper: you are my friend and i do not want to contradict yo ... Jtinn
12-19-05
I have found there is no other way to approach mechanical is ... Larryi
12-21-05
I have found only one isolation product far superior to othe ... Leec
12-22-05
Hello all. having horsed around with our hobby for 25+ years ... Avphile
12-22-05
Sorry, i was distracted & hit the submit button. insurance g ... Avphile
12-22-05
Also created for laboratory environments are the active halc ... Guidocorona
12-22-05
No doubt here that the vibraplane is the best isolation devi ... J_badov
12-22-05
J- badov - if what you said were actually true, the mass of ... Geoffkait
12-22-05
First let me thank the over 5000 customers now using the vib ... Sksos
12-22-05
Geoffkait - i can see where you are a little confused and ha ... J_badov
12-22-05
J-badov - the heavy mass used in vibraplane is employed to l ... Geoffkait
12-22-05
Something to keep in mind here are self induced internal res ... Theaudiotweak
12-23-05
Years ago i tried many shelves and stands. the manas proved ... Tbg
12-23-05
Theaudiotweak: in the case of our promethean & nimbus, we ... Geoffkait
12-23-05
Geoffkait nice to know that four course on vibration i took ... J_badov
12-24-05
J-badov, the equivalent performance (resonant frequency) for ... Geoffkait
12-24-05
Geoffkait, or you could partially fill the bladders with flu ... Tbg
12-24-05
I would use abs. minimum no. of bladders (of correct geometr ... Geoffkait
12-24-05: J_badov
Hey Geoff with out getting into a pissing match here. We may be talking about two different things.
I am not discussing the resonant frequency here. I am discussing the use of mass to keep the platform in place. Things at rest tend to stay at rest. The higher the mass the more extenal force it takes to move the object.
If the platform were directly coupled to a stand via cones etc. the seismic churning of the earth will disturb the platform. The better the isolation the less the transmitted force. The larger mass simply keeps in place. With out the mass the transmitted forces will allow the platform to move sympathetically with the seismic vibrations.
As for the density of the materials used, VP utilizes a large billet of steel underneath to make up the 150 lbs this thing weighs. A denser material would be much more expensive and in many case more difficult to work with.
Design of industrial and institutional vibration platforms is not the simple mass-on-spring you seem to think it is. They employ over 15 PE's on staff. Check out many of the vibration and acoustic control companies around and you will find that most of these companies are made up of PHD's. Not because they want to look important but because it is a very difficult field to understand.
If it were as easy as you seem to think it is they would just employ a couple simple dense slabs of Corian separted by a couple of springs. Or every one would just use two pieces of MDF with a Thermarest mat in between.
Rest assured my textbooks are well dusted. I am PE Mechanical Engineer and work with a number of Vibration consultants on my projects on a daily basis.
J_badov (Answers | This Thread)
12-24-05
J-badov - it appears you have your concepts of isolation and ... Geoffkait
12-24-05
Hey geoff, i must agree. cheers and happy holidays. sorry i ... J_badov
12-24-05
Tbg, kuzma uses a silcone, fluid damped isolator in their re ... J_badov
12-24-05
Depleted uranium is nothing but regular uranium with a sligh ... Guidocorona
12-24-05
Hello all. i am taking precious time away from my wife's won ... Avphile
12-25-05
Guidocorona; thanks for your christmas cheer, ha ha ha, love ... J_badov
12-26-05
Been gone on vacation for the last 5 days and now see why ad ... Leec
12-26-05
Thank you j_badov, and a very merry christmas to you too! s ... Guidocorona
12-26-05
I have a question to ppl wiser than me on this subject. wha ... Elberoth2
12-26-05
Elberoth2, yours is the question that divides different solu ... Tbg
12-27-05
Tbg - can you name those solutions ? Elberoth2
12-27-05
What's wrong with you people? this forum has turned into a ... Mrdavidterry
12-27-05
Mrdavid, i think the thread is long past what you are concer ... Tbg
12-28-05
Tbg - i think that absorption is not exactly the same as cou ... Elberoth2
12-28-05
Elberoth2, i am suggesting here that grounding of the noise ... Tbg
12-28-05
Was the halycronics worth the (high) price of admission ? ... Elberoth2
12-28-05
Guess my last post was denied by audigon, i'll try and rephr ... Sksos
12-28-05
Elberoth2, i cannot really answer your question about whethe ... Tbg
12-28-05
Hi norm, no we have not demonstrated or even marketed the ac ... Sksos
12-28-05
Steve, not that i really care, but it is not true that herza ... Tbg
12-29-05
From hwl scientific instruments gmbh web site: 1987 john sa ... Elberoth2
12-29-05
You're right norm, it doesn't make any difference. i was jus ... Sksos
12-29-05
Geoffkait could you explain your isolation device. could yo ... Seurat
12-29-05
Seurat - machina dynamica (my company) currently makes 3 iso ... Geoffkait
12-29-05
Very interesting. what are sesimic vibrations? Guidocorona
12-29-05
has anyone here tried these magnetic levitators from gr-re ... Tin_cup
12-30-05
Guidocorona - seismic vibrations are the energetic waves tha ... Geoffkait
12-30-05
Considering that seismic vibrations have long wavelength, se ... Seurat
12-30-05
Geoffkait, i just read this thread, and frankly am not sure ... Jadem6
12-30-05
Thank you geoffkait, i am glad 'sesimic' is but an unoffici ... Guidocorona
12-30-05
Guidocorona - ya got me! i thought you were the one that co ... Geoffkait
12-30-05
Jadem6: i cannot speak from experience regarding the brillia ... Jtinn
04-17-11
I've given credit to things like upgraded power cords, dedic ... Lacee
04-17-11
Symposium using stealth amp stand roller blocks stealth stan ... Ebm
04-18-11
In my opinion, no isolation foot or platform even comes clos ... Tbg
|
|
