I read a few posts here some time back about users wanting to isolate their subs from the floor.

Today I finally got around to cutting up my EP600 shipping carton for recycling. On the bottom of the carton, I discovered the insert shown below. Your sub cartons may have contained something similar. If so, it might make a great isolator for those of you that need it. I bet you can spray it any color you want or cover it with some fabric.