mijostyn
Uberwaltz if you can jump up and down in front of the turntable and put the edge of a stethoscope against the platform with music at a moderate volume and not hear an increase in the volume through the stethoscope you are good to go.
A better method IMO is to mute the system, put your tonearm down on a "STILL" record....unmute and slowly raise the volume to normal listening level.......and then do the Audiophile dance.
Extra points of hobby freedom are awarded, if you do this and let your wife catch you in the act. She (he) will likely be thrown off ....ah .. intimidated a little. ........after this, and will leave you alone.
The Audiophile Turntable Dance Test....ATDT..... as far as spousal reaction goes, is superseded only by the "Finding the Best Speaker Spot...... for Bass" .....test.
A sturdy stand on a concrete floor is always the best.
Concrete pads are not bullet proof and contain air pockets. It is important to test for location before placing your setup permanently there. You don’t want to be on top of the air pocket.