I guess I read your post right the first time. The GRAMMA isolation pad is designed to eliminate the floor from becoming part of the speaker. It uses some heavy duty high density pads that are about 3 inches thick and is mounted to a carpeted piece of MDF for the sub to sit on. It raises the sub off the floor about 3-4 inches and lets the sub breath a little better. I have the first version which is as described. The newer version doesn't appear to give the same rise.
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Music system
Model 990/7500/Magnepan 1.6 QRs/Technics SL1200 MK2/Aperion S-12 Subwoofer/OWA3/Sony NS75H DVD
APC H15 Power Conditioner

TV System
Large Advent Loudspeakers/ Polk center/Monoprice surrounds/Panasonic Viera 42 inch/Onkyo HT-RC260/Sony BDP S590/Directv


Home Theater System
Onkyo PR-SC886/Outlaw 7125 Klipsch RF-82 L/R,RC-62 center, RB-35 SR/SL, BENQ HT1075, Outlaw LFM1-EX/OPPO BDP-83/Directv
Harmony ONE
Blue Jeans and Monoprice interconnects
APC H15 Power Conditioner