Auralex SUBDUDE HD Home Theater Sub Isolation Platform

This product does improve subwoofer performance by isolating low frequency vibrations from the floor. Before using this product, I had my subwoofer on the floor and it rattled the surrounding stuff through the floor. Now, with the same subwoofer placed...

Bought SUBDUEHD model. I received regular lower end SUBDUE (NON HD). Sent email to seller. Never got a reply