Acoustic Science Corp (makers of Tube Traps) also recommends getting the subwoofer(s) up off of the floor (18" to 21") using their Subtrap.
My VMPS Larger Subwoofer is 21" off of the floor and it sounds much better with a tighter response.
My VMPS Larger Subwoofer is 21" off of the floor and it sounds much better with a tighter response.