Wayne Parham Messages: 18756 Registered: January 2001
Illuminati (33rd Degree)
I would agree that fiberglass in the lung is not a good thing, but I don't think good quality R13 used in loudspeakers disintegrates to become airborne in enough quantity to hurt anyone. I have confidence in the ability of R13 to absorb sound and in its durability. I've never run into trouble with it disintegrating, even in adverse conditions like humid and dirty environments. Other products are fine too, so it's not a problem to substitute it with another similar fiberous material. But I think R13 works good, and I don't find it troublesome with respect to disintegration.