10 Pcs UF90B Clip-on Ferrite Ring Core Black for 9mm Diameter Cable
You clamp these rings (magnets) on wires going to and from your electronic equipment to keep Radio Frequency (RF)signals from \\"riding\\" these wires into your equipment causing distortion that often comes through the speakers. If you have a lot of wires, you may have to put these rings on all of them. You will also have to make sure of the size of the wires. If you don't buy the right size ring, it will not fit on bigger wires. I have a ham radio operator across the street, and I have older analog stereo 