Vibration Theory - Isolate or Drain?

For speakers, definitely the solid points seem best. So guess they are a 'drain' sort.
The reason for speakers seems to to stop the speaker cabinet from vibrating. and letting the floor vibrate? but it seems on points both vibrate less??
So anyway, from thier it would seem devices that do NOT have any internal vibration (electronics), I want to deaden any external vibration from entering. So if my rack is really solid I would use points, if my rack vibrates, I would use a softer foot, to keep the rack from buzzing up the electronics.
For CD, it would depend on the transport, if it is better to let the case vibrate soft feet, or try to stop the case.. points. With points, I would think they would work best with mass loading (Especially if the transport is lightweight!)
For my TTs, I use soft, with mass loading under the bases of the TTs. So the rack is as solid as I can make it. (though it is still a cheap rack)
So, finally: IMO f you have a cheap rack, use soft, if you have a structurally solid rack, use points.
This is my theory.. so far.
In practice, My Maggies are stock, everything else is on soft feet. If I ever do it, getting a solid frame to hold the Maggies would be a good idea. Not the reframing thing, just a brace and footers.
I would never spend a small fortune on high quality stands.. IMO not a great bang for the buck. The same money towards electronics would be a wiser move. (ditto cables) So a little better than average on racks and cables is fine by me. This is my opinion. and has no basis in reality,experiments, testing, theory.. other than it is what i do. (A really solid TT stand might be cool, If i could make, or buy one dirt cheap. Concrete sewer pipes spiked through the carpet 400+ lbs of concrete should do.... etc. (it would be GETTING them and moving them as the challenge!!!!)

Isolation only exists in the absence of matter. Come to think of it with no matter there is no existence. Drain the vein..the method is the magic. Quadruple entendre's may apply. Tom

I use both approaches in my system. My belief is that coupling (i.e. draining) works best with speakers, while decoupling (i.e. isolating) works best with just about everything else. That is 50% science, 50% hunch.

Don't ask me for the science.

Bryon

Some may find this discussion draining and isolating at the same time;-) This is not just an attempt at a little dark holiday humor, but actually a preview of my experience described below.

I have tried both approaches with my CDP and find: 1. there is a clear difference in sound, and 2. for me at least, draining clearly sounds better. But wait, I also use isolation...

I have my CDP resting on hardwood blocks on a very substantial maple platform, bypassing the stock rubber feet in an effort to "drain" vibrations away from the CDP and into the heavy platform below. Placement of the blocks makes a difference, and I have found placing one directly under the transformer is critical to improving performance. But I then "isolate" the platform from the supporting shelf and the rest of the room with sorbothane dots to "protect" the CDP-block-platform "system" from external vibrations resulting from, among other things, the occasional loud music passage.

I have tried pretty much every permutation of these components and some others, and like the sound of my current arrangement best. I would describe the CDP sound as relatively more clear, articulated, dynamic and fast. In contrast with the stock rubber feat or sorbothane directly under the player, the sound turns soft and a bit mushy. It is actually surprising how much difference these vibration control measures make - it is not in the least bit subtle. I use the same approach with my turntable that I do with my CDP, but find no noticable advantage with isolating or draining vibration from my SS amp and tuner.

My speakers are also on platforms, but these are on blocks, spikes or Bluetack directly on the floor in an attempt to get the vibration out of those boxes as quickly and thoroughly as possible.

As for the microscope analogy - I worked with microscopes for many years, and yes, vibration is the enemy. But purely optical microscopes do not generate any internal vibration of their own, so there is no need to "drain" it away from the lenses - it is all about keeping vibration out and isolation is the name of the game. Lights are often attached or driven by outboard transformers to keep any vibrations they might generate away from the scope body. Scanning electron microscopes are a different story, and one I am less familiar with. But I digress...

i've found with my lowly oppo 970 that experimenting with brass placement on cabinet top of tray and vibrapods under really enhances sound out of that $150.player.