Springs under turntable

Most interesting thread, read it all and it stayed 99.9% civil. Excellent considering the subject matter.

So about 6 months ago I experimented with springs under my 401 which is similar to noromance at about 55lb total weight.

There may have been a little more air at the top but to my ears it lost mid and bass impact. Not huge but enough to be noticeable.
Now to be fair these were springs I had bought on eBay after spending a lot of time with a spring calculator trying to make sure I got the best set-up.
Quite possibly I missed the mark.
Those springs are now under a sub.
Just ordered 2 sets of the Nobsound sets off Amazon at $32.99 a set.
These I can tune so now have options.
Many thanks guys!

There may have been a little more air at the top but to my ears it lost mid and bass impact. Not huge but enough to be noticeable.

This is a sign the springs were probably under not enough compression...

It takes me 4 trying to adjust the springs box nobsound....

@mijostyn
"When correct implementation of zero stiffness on loudspeakers is administered, there is no question of the superiority of this engineering practice on the voicing of the loudspeaker." (rixthetrick)

rixthetrick, What is zero stiffness? That is a term I have never heard before. How is superior when it comes to "voicing" a loudspeaker.

My father would have asked me if I'd bothered to look it up, before he'd answer such a complex question.

Zero stiffness:
http://www2.eng.cam.ac.uk/~sdg/preprint/OnZeroStiffness.pdf

As others have already mentioned, the effects of correctly implementing vibration isolation, is audibly heard. Correctly done, it's immediately recognized. And I don't need to prove it, you can do it for yourself, for really cheap. However, you need to know something about what you're doing.

For example the springs in your car/truck/motorcycle are rated specifically for that device. It smooths out the ride, it doesn't completely make it linear. Zero Stiffness is an ideal.

If you have electrostatic speakers (with their own limitations) or dipole speakers (with their own limitations) this is not likely (I would guess) to have nearly as much impact as an enclosure that is ported or sealed.

In most cases, I believe it's not the inertia of the small moving mass of the cone and voice coil that creates the most stored energy in a loudspeaker cabinet. I believe it is the sudden high and low pressure created by the drivers moving air within the cabinet (even a ported cabinet should see this pressure difference) that will deform the walls of the cabinet. It's not just pushing or pulling against the walls, it's doing both at a frequency that excites the cabinet.

Lewm mentioned transmission line woofers, I can see your logic,  and it makes sense. Have you tried isolation anyway?

They make little blue pills to deal with zero stiffness

Well played!

This is a sign the springs were probably under not enough compression.

I think you could well be right.
When sitting on them they only compressed maybe 1/3 possible not even that.
Hopefully with the adjustment available on the Nobsound springs I can tune it to my liking.
If not I can try them under other items.