Racquetball isolation platform perfection

Sorry, Bomby, didn't mean to misconstrue your words.
--I believe turntable design has truly changed through the years. Yes, it's still a rotational platter, yet, the ways to make it spin are everchanging.
--To all you table rappers out there, stop it. It proves nothing. Plus, I'd hate to have you damage your cartridge.
--To all Gingko owners or diy-ers of balls, your product and method can be fine, but not always, not for every situation and product. There are many ways to isolate--cones, points, balls, tubes, sandboxes, air, wood cubes, etc. Many will do a great job of isolating, and of giving support. Not all will "sound" great in a given situation. You may isolate the hell out of your item, but what if it does something to the sound as well? something not good?
--My opening glib comment was just that, these things have been going on for years--years! But I would never be a buzzkill for someone who's taking the interest to try and improve their system. We all start somewhere. For a lot of us it was the 80's.
--Apologies to Bomby.
--I know it's fun to experiment, but why not just use a wallmount if you're trying to isolate something? If that can't do it then you are in serious need of a solution.

Hey Chashas1,
thanx for the clarification & apologies.
Looks like agree to disagree on TT fundamentals. That's fine with me as we each are entitled to our own opinions.

To all you table rappers out there, stop it. It proves nothing.

I'd like somebody to explain why this is not a good test. Right now those who oppose it are saying "this is not a good test because we say so". I'd like some explanation better than that. I claim that knocking on the rack/shelf/plinth/sandbox, etc excites resonances & one can hear thru one's speakers how well these resonances have been damped before the cartridge picks them up.

Sure every tweak has its sonic signature & that applies to the wall-shelf as well! Your words seem to imply that the wall-shelf has no sonic signature but that's not true. I think that all the tweakers are fully aware that when they undertake a tweak it might not work out & that their effort might be wasted. Goes w/ the territory.

Many times having a wall-shelf is simply not possible for a myriad of reasons - looks too ugly, studs too far away, spouse will not allow it, not enough space, etc, etc. So, the wall-shelf cannot be a panacea for many. Certainly you do not think that these people are sunk???

Looks like we need to part ways on this isolation idea as you certainly subscribe to some other idea(s). That's fine with me.

"I'd like somebody to explain why this is not a good test."
"I don't have any evidence at the time of writing this post so you are free to dis-regard my post re. the knuckle rapping test & carry on w/ your life.
I'm afraid that I do not have scientific evidence, etc for every tweak that I do. If I were a man who did every tweak only after I found scientific evidence I would most likely not be in this hobby."

Problem is Bombay, that you simply don't understand the physics and acoustics involved in translating 'impact-induced' sound transmission with either Structure-Bourne or Air-Bourne Sound transmission and as you say, you don't really care?
Yet you now want us to tell you why your 'rapping' test is irrelevant?
Just go ahead and enjoy yourself....but for heavens sake spare us your attempted pseudo scientific justifications?

Thanks, I am delighted to be forgiven and dismissed all in one paragraph.
I would say, or rather ask, one thing, Bomby, in looking at your system, couldn't most of your problem in needing further isolation be eliminated by removing your source from between your speakers?

p.s. and again, sorry, but you are just plain wrong--a good wall shelf will have less of a sonic signature than the tweeks you have been suggesting. and quit beating on your equipment, you're proving nothing...

Bombaywalla
If you hit yourself in the head with a hammer do you feel it? If I hit your turntable or stand holding your turntable do you think its gonna feel it and your gonna hear it thru the speakers? OF COURSE! However if I hit the wall across the room with the hammer now will your turntable feel it, will it amplify thru the speakers?

This was my point use the source of speakers to induce some kinda airborne or vibration in the room structure, not smacking it with your hand, this is a totally different induced action. I mean of course if you tap on your turntable with a pen you will hear the ticking thru your cartridge and amplify it with the speakers, but are your speakers that are not physcially touching even with heavy bass making the same "Knuckle Rapping" sound thru your system? No because unless you are literally bouncing your woofers into your turntable stand to physcially contact it like you are with your hand your really proving nothing right?