Topnisus [Pack of 10] Clip-on Ferrite EMI Cable Cores for Noise Suppressor Blocking RF-Interfere EMI-Interfere Improve Signal Integrity (20pcs with 5 Sizes)

Use these on my rode video microphone and the annoying buzz I would hear when monitoring my audio through headphones is completely gone!

5 star product

Very quick delivery and the quality of the product seems good.I use these for preventing EMF radiation from travelling up the wires on headphones. I did have some problems opening them, as the clips are a bit tricky and quite small but eventually figured it out.

Wasn't sure if I should place one or two or four of these on my cables so I went overboard and placed two at each end and was not disappointed.I didn't know RF noise was a real problem when it came to microphones until I got back into studio equipment and when I first connected my microphones to my recorder I thought my recorder was broken; I kept hearing this high pitched beeping and fuzz reminiscent of when phones back in the 2000s used to interfere with speakers. Turns out that's the sound of wifi and other wireless transmissions being picked up by cables that are unintentionally acting as antennas.You can usually remove the sound in post but it's always best to ensure you have something of high quality going in (after all, garbage in, garbage out). Tossing these simple, cheap magnets onto your cables just might save the day.I have tried different mics on the same cables and found that the mics themselves were picking up RF interference and when that's the case, these won't help. They're perfect for cables though (I have WBC XLR cables and the 7mm versions of these are perfect).I even picked up a second 10-pack of these so I can attach them to other unshielded, unprotected cables for piece of mind because once you hear the annoyance of RF interference, you don't want to hear it again and at under $10 for a pack, these can't be beat.

Had line interference!Found these helped on my line! But buddy two doors down has it much worse and didn’t help him, so I would say depending on the extent of your noise these may or may not work for you!But it’s a good start!Might have to use line filter!All I can say is they worked for me!