Ferrite Ring Core Ferrite Beads Clip RFI EMI Noise Suppressor Anti-Interference Cable Clip for 3.5mm/ 5mm/ 7mm/ 9mm/ 13mm Diameter Cable, Black (20)

I have 3 studio monitors (L,R,mono reference) and used 6 of these, 1 on each balanced XLR cable and 1 on each power cable. Prior to installing these, my cell phone would cause hissing/pop/general interference within 4-5ft of each speaker. Now, I can stick the phone right next to the tweeters and cones, and zero interference. This was my first solution to the problem as it is very inexpensive, and I'm so happy it worked.If anyone else has these issues, I highly recommend you give this a try as its very cheap, and worked 100% for my issues.

These worked perfectly to reduce noise in my HF Ham radio. I put them on everything including a led lamp lighting my station and the noise floor dropped dramatically. I appreciate the different sizes and the amount for the price. My sole complaint is they can be hard to lock closed. Once done however, a one time thing, you have a quality choke.

These seem to work fine, but the plastic latches that are supposed to fasten them to the line are almost useless. I ended-up using electrical take in almost every case.

I had some speakers that had some pretty aggressive humming and were picking up some radio frequencies and would play whatever station it was picking up ever so quietly and it was driving me insane. I bought these and put them on my speaker cables and immediately noticed a huge difference. I hear a slight bit of static but no sound from a radio station which is perfect. For the price and variety of sizes these are a must have.

These did the trick. Had a bunch of harmonic noise caused by a nearby switching wall wart. cleaned up my SDR receiver on 20 M. Nice collection for price.

I still have noise when my head lights are on in the radio if My car

Switched to LED bulbs from halogens for the cargo and license plate lights on my f150 causing disruptions with the key fob. Threw some of these on the wiring harness and improved the range drastically.

This works and it's very easy to use.For years my mechanical keyboard turned off or flickered whenever my box fan from across the room (on a different outlet) changed modes. It was driving me crazy! Eventually I asked AI what it might be and it recommended Ferrite Beads, so I tried this out and sure enough it solves the problem! I grouped all my usb dock cables into one bead, added one to both sides and now the connected devices are totally unaffected by fan mode changes and probably other things too.