I love those things! When you told me about the speakers I thought that was nuts. They would have to work on the drivers, the magnet or something like that, and from so far away? But it worked. Just one. Ugly as hell though so....
Removed the drivers, cut some Mats up into strips, zip tied them along side the wires and around the driver magnets. Improvement? My wife who hardly pays any attention asked what made it sound so good? She doesn’t know one word of audiophile lingo but she knows when it sounds more like real natural music.
Then you told me about speaker cables. So I laid one Mat on each speaker cable. Sure enough. Now I know to cut em up, made em into tubes, they work so good that way!
I’m sure you remember Frank, this is for the others. Recently what with all the moving around for Chuxpona we wound up with some of these laying around and sometimes like last night I will put another one or two back on a wire somewhere. The tubes I made are different sizes so depending on what we are talking about could be anywhere from 1/3 of a Mat to 1/6 or sometimes even less. Even this small amount, still very easy to hear. To answer the question then no, it does not go bad over time.
