Dreamtop Ferrite Core Ferrite Beads - 20Pcs Ferrite Choke Ferrite Clip-on Black RFI EMI Noise Suppressor with 3.5mm 5mm 7mm 9mm 13mm Inner Diameter for USB/Audio/Video Cable Power Cord

I used a few of these on my HI-Fi system. At full volume I had a slight motor bike popping to go with my slight earth loop problem.I put one on the preamp mains lead ( fed by a Tacima strip), but no discernible difference. Same for power amp- at the equipment ends. Then put one on the phono input lead and hey presto the popping stopped. I put one on either end of my interconnect also for good measure. I’m still left with the slight earth loop hum (proved by temporarily substituting a transformer -it’s not staying as it greatly reduces sound quality) but of course that’s a different problem to the popping. As expected, no immediate noticeable difference to the sound of the music. Anyway the ferrite rings worked regards the popping and must be a good measure against other RF nasties. Good value and choice of sizes-press hard! ;-)

These are generally good, my only gripe is that when you try to clip them around cables, sometimes the clips don’t meet and miss each other because the plastic bends a little. Once they are on they stay put, as long as the clip you’re using isn’t too big for the cable obviously. As for if they work, I cannot say for sure, but when it comes to reducing interference of any kind it’s worth a try.

I used these around the cable outputs of many switch mode power supplies and mains cables to reduce the amount of 'electrical noise' near to my hi-fi amplifier and other equipment. It was part of a 'housekeeping' project to tidy up the rats nest of cables behind the TV, separating switch mode supplies into a dedicated distribution block and physically distancing them from speaker cables etc. They are easy to use, just select the appropriate size and they just clip on. A cheap solution that will reduce electrical noise. My hi-fi amplifier was the only device that I didn't fit a ferrite bead to, as it has its own mains conditioning, that was just plugged into its own mains socket.

Great set of Ferrite choke rings to fit every size of cable you are going to use in your home. A Must with how bad the UK mains power can be with Radio interference, power surges like when Fridge comes on or off causing a crack in sound from the speakers of your expensive Hi-Fi or TV. The use of Ferrite choke rings on your cables of sensitive electric equipment will help suppress or stop the mains power surges and Radio Interference which can be very bad if you live high up like on a hill or near a number of radio masts. These Coke rings come in a nice to use box and are easy to fit.

I had horrible noise coming through a new expensive phono pre-amp. tracked it down to the 40 year old cables from the vintage technics turntable. Clipped a couple of these on it- noise gone. Worth the money and I have a load left for any other problem issues

Good range of sizes in the package. However, used this on my computer's peripherals to reduce RF interference from my amateur radio, however it had no effect. There will likely be some devices or products that this will be useful for, but for amateur radio purposes, I recommend a toroid core instead (to wrap the wire or coax around multiple times).

Did the job and has reduced the dabs dropping out not all the kit was required as some were too large but was as described

Does what it says on thectin