On May 30, 2012 at 17:03, FASTLs said...
When I am designing a subwoofer into a new cabinet, I have the bottom cut out so subwoofer does not touch the cabinet and sits directly on the floor. This mitigates the cabinet shaking from the subwoofer since the two are now not touching.
FASTLS
+1
And do not place your sub on foam or any other material. It is designed to sit on a solid surface.