cardiackid I did a search on the Vinyl Asylum but did not see any postings at all there from you. http://db.audioasylum.com/cgi/search.pl?searchtext=&b=OR&topics_only=N&forum=vinyl&topic=&author=cardiackid&date1=&date2=&slowmessage=&sort=score&sortOrder=DESC
Anyway, you may want to try this question there. There are some individuals with very good engineering backgrounds there that will perhaps respond to your question, which of course has been asked there in the Vinyl Asylum on many occassions. MOST of the time the responses come from those with little background in the study of the technical reasons such decisions are made by a given manufacturer.
To wit: the type of vibrations we are talking about isolating and, almost equally as important, WHY we are trying to isolate them.
A good example of this is the more simplified reason a suspended deck was developed in the first place: Its suspension is tuned, or should be tuned, to somewhere around 3Hz. This means resonances above that freq are isolated from ever reaching the table, so long as the installation is optimized (e.g., a springy floor can spell disaster).
AIRBORN vibrations, such as those coming from a pair of JBL's at 110dB SPL, are of course not isolated from reaching the cart/arm combination. So there are those who will only put their table, isolated or otherwise, in an adjacent room.
The point here is that we must be sure we are talking about specific vibrations that occur in a specific environment (what happens when you live in a flimsy flat in the inner city and trucks roll on by hourly?; Here the ADVANTAGE clearly goes to the suspended deck).
There are those who have taken issue with Mr. Conti's engineering, and are backing this up with their own examples. I am not one of those individuals b/c I am NOT an acoustical, electrical or mechanical engineer, the latter being perhaps the most important in matters of bearing design, the former in helping one with acoutic vibrations.
If you want sound engineering based on mathematical equations to reach some end, and then sophisticated measurements to substantiate the theoretical engineering which is finally substantiated in the listening room, well you may have a hard time squeezing that out of some of the non-suspended deck makers. Perhaps not!
I personally had so much trouble discerning these differences for myself, I ended up buying both a suspended deck and nonsuspended one (modified Gyro SE and modified Scheu). I will not reveal my preference here b/c it would be unfair, as I am not convinced that I have completely optimized either installation, although I've sure done a lot so far.
FWIW
Goyescas
Anyway, you may want to try this question there. There are some individuals with very good engineering backgrounds there that will perhaps respond to your question, which of course has been asked there in the Vinyl Asylum on many occassions. MOST of the time the responses come from those with little background in the study of the technical reasons such decisions are made by a given manufacturer.
To wit: the type of vibrations we are talking about isolating and, almost equally as important, WHY we are trying to isolate them.
A good example of this is the more simplified reason a suspended deck was developed in the first place: Its suspension is tuned, or should be tuned, to somewhere around 3Hz. This means resonances above that freq are isolated from ever reaching the table, so long as the installation is optimized (e.g., a springy floor can spell disaster).
AIRBORN vibrations, such as those coming from a pair of JBL's at 110dB SPL, are of course not isolated from reaching the cart/arm combination. So there are those who will only put their table, isolated or otherwise, in an adjacent room.
The point here is that we must be sure we are talking about specific vibrations that occur in a specific environment (what happens when you live in a flimsy flat in the inner city and trucks roll on by hourly?; Here the ADVANTAGE clearly goes to the suspended deck).
There are those who have taken issue with Mr. Conti's engineering, and are backing this up with their own examples. I am not one of those individuals b/c I am NOT an acoustical, electrical or mechanical engineer, the latter being perhaps the most important in matters of bearing design, the former in helping one with acoutic vibrations.
If you want sound engineering based on mathematical equations to reach some end, and then sophisticated measurements to substantiate the theoretical engineering which is finally substantiated in the listening room, well you may have a hard time squeezing that out of some of the non-suspended deck makers. Perhaps not!
I personally had so much trouble discerning these differences for myself, I ended up buying both a suspended deck and nonsuspended one (modified Gyro SE and modified Scheu). I will not reveal my preference here b/c it would be unfair, as I am not convinced that I have completely optimized either installation, although I've sure done a lot so far.
FWIW
Goyescas