Footers under new speakers

@ronboco, I wonder how many here have actually measured how much their speakers are resonating.

Measure it accurately: I use an old unloved, unwanted tonearm and cartrige jury rigged so I can use it to measure vibrations. This is way more sensitive than any phone App! Just rest the stylus on the DUT and plug the output into a spare amp phono stage and measure the output with DVM.

Isolation works best as has been described.

Also how can we know the platforms don’t alter the pistonic movement of the drivers thus altering the sound?

Newton’s 3rd law states: For every action there is an equal and opposite reaction, so yes there will be an alteration but will you hear it?

Using Newton’s Law and considering a conversation I had with Max Townshend at the Premium Audio Show in Veldhoven, Holland in 2019 who has now sadly passed away, the old gentleman explained that say your speaker weighs 40Kg and the cone of your speaker weighs 40gm we find a weight ratio of 1:1000 which equates to 0.01dB

You will not hear that. Consider the response of your room’s huge effect on your speaker output. Below Schroeder the room dominates. Fact. Even an acoustically treated room will have peaks and nulls and if not then you will measure peaks/nulls in the order of 12 to 15?dB.   You gonna hear 0.01dB.  Pffft

What you will hear is a vastly improved sound when speakers are Isolated.

@buellrider97 I somehow lost a long detailed post. Please see post above regarding Uncle Newton to allay any fears and restore your logic

I am also carpet over concrete. How about removing your carpet and epoxy coating in any colour the entire surface as found in car dealerships. A rug between speakers and you necessary. If placed on plastic honeycomb underlay it will allow the rug to breathe. I don't know your domestic agreement with the boss but if you can swing it use a ceiling cloud which brings huge benefits. Consider that we evolved with our ears always the same distance from the ground and that the ear/brain relationship allows for this. Far more damaging is reflections from the ceiling. Outdoors there is no reflection from above except in a thick forest where jungle sounds are pleasant.

A ceiling cloud along with bass traps is the strongest weapon in my armoury.

I intend to DIY some springs similar to Townshend but my detailed explanation somehow vanished. This can be another post if you're interested.

@lemonhaze 

What is the .01db ? Cabinet resonance ? If so I’m not talking about that I am talking about if the cabinet is allowed to move on the podium will it affect the drivers ability to properly produce the notes. 

Sorry I meant move with the podium 

@lemonhaze , Hi , at this point I’m not willing to compromise the carpet. I’ll probably replace it in the near future with a low dense Berber. I’m going to remove the nearby carpet, wood, and tile about 1000 sq. ft. , with glue down oak. The amount of that carpet going to wood will already impact the noise level in the house.