Originally Posted by Sevenfeet
Moving the sub off direct contact with the floor may help too, especially if what's under the floor is causing trouble. Years ago I discovered that the sub in my theater was sounding awfully boomy. Turned out that the garage under by theater room was the cause. The large space with metal cars and concrete floor caused all kinds of problems, much like a drum stuffed with hard objects. The solution was a Aurelex Mo-Pad which is a foam platform to decouple the sub from the floor and the difference was night and day. SVS also sells add-on feet that effectively do the same thing. I have them on a different SVS sub in the house and this solution works well too.
Not to get the post off the rails, but the idea of these subwoofer “pads” suggesting “decoupling” vibrational energy from the sub to the floor is pure nonsense.
If a subwoofer has no feet whatsoever ever, rubber feet, like hardware store variety, are all that is needed to creat a level seal of the cabinet to the floor. Nearly all name brand subs do. Absent any feet, this pad would do that, at a premium, but there’s no secret sauce.
Any sonic change is due to the physical upward movement of the sub, which even a few inches, can cause an audible change. Anything around your subwoofer that is rattling is doing so from acoustical energy, not vibrational energy. The pad under the sub couldn’t possibly absorb a fraction of low sub 80hz sound waves. You’d need a mattress thick pad to do that. However, moving the sub in the right direction, including upwards, can shift that acoustical energy, and bass modes, and cause things to no longer rattle.
My suggestion is to use the styrofoam frame that the sub came in. And see how the sub performs with that around it. If you like that, sure, get the pad, it does look nicer. But again, sonic benefits are coming from the sheer movement of the sub. Not some gee wiz effect of the pad.
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