[GregS[_3_]]

In article , "William Sommerwerck" wrote:
Almost 30 years ago, Jon Dahlquist accidentally discovered that painting a
speaker cabinet with 3M "fuzzy" paint (I forget the trade name)
significantly improved the sound, apparently because it dampened the
surface, preventing it from becoming a secondary radiator.

I heard a demo of this, and was surprised.

Defraction or anti-defraction rings will change the sound as well as doing the entire surface. I
have treated a number of speakers with felt like materials. It might not be a good
thing on all speakers as they are voiced as they are, but when building speakers
or modifying its a very nice thing to do. It can lift some of the cabinet edge smearing.

greg