[Warren]

Funny, just doing some searching and apparently I am not out of my mind about the speaker materials being able to pass air through them.  Good first paragraph on this page.

https://acousticalsolutions.com/product-...AgXo8P8HAQ

OK, I still feel if you were able to glue all the material to the backing it would probably stop the rattling, of course you cant glue it where there is no backing but if there is no backing then it isn't going to rattle at that place anyway.
Just to clarify, I wasn't saying the speaker cloth wont let air through it, it actually has to be able to do that. I was saying the paper you put over the speaker doesn't let air through it. Well, Good Luck on this.. If and when you try a few things and find out for sure why it rattles, let us know why. The Best, Warren