SOTA, soft feet or cones, when to use either?

I bought finished slabs of marble from Mr. Seconds, about 20" x 20" and use it under the cones on both of my Sotas.I guess it sort of "couples" the table to a larger mass,in theory making this a hundred pound turntable. The biggest reason I did this is because it looks cool.

Just ran across this thread- The reason is that the Sota has a spring suspended subchassis with a low fundamental 'bounce' frequency, of about 2HZ; this makes it nearly immune to high frequency vibration, but vibration at or near it's fundamental can send it into resonance. The soft rubber feet are themselves springs, so the whole table has a fundamental that's undesirably close to the fundamental of the subchassis. With the table base on cones(preferably threaded in tight), on a rigid support, only high frequency vibration reaches the suspended subchassis, which it can easily deal with.

To demonstrate the resonance effect, take your table for a ride in a car, which is suspended at just about the same frequency as the table; it will go NUTS! Unless you lock down the subchassis, of course. Or don't risk damage, I've done it, so you don't have to.

I installed the feet and re-leveled it all and it sounds a bit tighter in bass but I have no idea why but I like it! Thanks as always for all input,,,,,cheers

I switched to Audio Points cones and noticed a "clearing up" of the music. Putting my SOTA on a Mapleshade made a bigger improvement (I started with a 2" slab, now a 4" slab). I tried a Boos maple cutting board, and the Mapleshade was so much better. It got the "wow" factor from my wife.

Earlier I had the SOTA on a wall mount (Target) with either the original MDF shelf or a 1.25 cutting board that fit inside the rack. The Mapleshade sounds much, much better (not using the wall shelf, just a Salamander system with the Mapleshade).

-Skot

I have a relatively new Sota Saphire and hadn't really considered changing out the old feet until I ran across this post.

Any issues with threading the Audio Points onto the Sota post?