Speaker rattles cabinetry

[Stu Jackson]

Buy a dowel at a hardware store. Cut it and slip it in vertically.

[Pelagic]

Originally Posted by steve77

Thanks, everyone. There is no access behind the plywood panel without removing major joinery. Above the panel, I'm positive there are about two to three inches of sprayed-in foam, followed by the metal deck.

Steve

Steve, if you cannot stiffen panel from behind, try and stiffen from underneath by installing a divider at the center of the bookcase to take the flex out of the panel.
..easy to test

[steve77]

Originally Posted by jamhass

You can drill a smallish hole (or 2 or 3) into the plywood panel and spray in a small amount of low-expansion spray foam (type used to seal around window casings). It will expand enough to stiffen the plywood nicely. Try a single hole in the middle first, you can always add more later if needed. Be judicious about it, especially if the space behind the panel communicates with other spaces. And be a bit careful of inadvertently gluing in electrical wires etc and causing problems later.

Thanks, everyone! I was able to remove the speakers and fit my drill into the enclosures, which allowed me to drill a hole into the space above the panel. I bought some French "Great Stuff" equivalent and was able to pump that into the voids above the panels. I guessed on the amount to put in since I have no idea how big the void actually is. It seems like I guessed okay, because the panel isn't bulging and the rattling seems to be gone. I can test the speakers more thoroughly when my wife is ashore.


It looks like this may have solved the problem. If not I will try some of the other suggestions y'all offered.

Cheers!

Steve