Going a bit further than what @elliottbnewcombjr recommended, you can go with Mapleshade’s complete vibration control system. A bit much visually, but I have found it to be effective, both in protecting from footfalls and cleaning up the treble at higher listening volumes. Also considerably cheaper than the Townshend or some other solutions.
https://shop.mapleshadestore.com/Vibration-Control-Systems_c_23.html
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