What are these on the speaker

What are the things on the speaker, are they resonance blk ? , where can I get them.
http://pic6.audiogon.com/i/c/f/1133108144.jpg

whatever12312-23-2005 6:39am

leedistad Details Discussions Posts This discussion Message User 104 posts 12-23-2005 at 05:08pm Copy Comment URL Report Comment Edit Delete Try the Totem Beak if you're interested. I don't know why they work, but they sure do!