Subwoofer resonance isolation platform vs footers.

The only experience I have is with what I'm using on carpeted floor. It does tighten up the sound (eliminates "boom").

> 1/2" MDF board (a shelf from my equipment isolation rack)

> 4 small Black Diamond Racing Cones between MDF and sub

Sub is a 12" square Sunfire wieghing about 45 lbs.