Explanation of Ferrite Cores by Audio Systems Group: Awesome

Thanks for the response, and particularly the two links provided.

The second link ( to: "Understanding How Ferrites Can Prevent and Eliminate RF Interference to Audio Systems" by Jim Brown (K9YC), Audio Systems Group, Inc.) was terrific. It answers all of my questions, even some I had not yet come up with.

The first link, to a wiki definition was one I had already found but still left me with questions. Thanks a bunch.