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! ;-)

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.

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

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

Pretty good products, they reduced both the low end hum (with the loop trick) and high end hiss (with the single wire through). I found placing the loop in the middle for lows was a good place, with the highs clip at each end close to the connection.

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).

I bought this set and used one of the ferrites to remove DAB radio interference being caused by a hard wired dash cam power supply. Picking the right size and choosing whether to loop the wire through is a bit hit and miss, but there a is a good variety in the set to allow you to try a few options and find one that works. Clips etc. seem good quality.

Good value for money, get a lot of ferrite beads for the price. They're easy to attach to a cable and seem to stay on pretty well, they don't slide around or open up. One downside is that when I received them, a lot of the pieces of ferrite have fallen out of the plastic casings and I had to put them back inside myself. This caused some of them to smash together in transit since tiny pieces of ferrite were loose in the bag. It wasn't anything that would affect their effectiveness though.

Die Ferritkerne sind ideal, um störende RFI- und EMI-Interferenzen in meinen Kabeln zu reduzieren. RFI (Radio Frequency Interference): RFI, oder Hochfrequenzstörung, bezieht sich auf die Störung, die durch unerwünschte Funksignale entsteht. Diese Signale können von vielen Quellen stammen, wie z.B. Mobiltelefonen, Funksendern oder elektrischen Geräten, und sie können den Betrieb von elektronischen Geräten beeinflussen, insbesondere solche, die auf Funkfrequenzen basieren, wie z.B. Radios oder drahtlose Kommunikationsgeräte. EMI (Electromagnetic Interference): EMI, oder elektromagnetische Störung, ist eine breitere Kategorie, die alle Arten von elektromagnetischen Störungen umfasst, einschließlich RFI. Diese Störungen können durch verschiedene elektromagnetische Quellen verursacht werden, wie elektrische Motoren, Transformatoren, Computer oder sogar Blitzschlag. EMI kann den Betrieb von elektronischen Geräten stören, indem es in die Signale eindringt, die diese Geräte senden oder empfangen. Ich verwende sie vor allem an meinen Audio- und Netzwerkkabeln, um unerwünschte Störungen und Brummen zu minimieren. Besonders gut finde ich, dass das Set eine Vielzahl von Größen bietet, sodass ich für jedes Kabel den passenden Ferritfilter finde. Die Installation ist kinderleicht, und die Ferritkerne lassen sich problemlos an den Kabeln befestigen. Die Störungsunterdrückung funktioniert hervorragend – klare Empfehlung für jeden, der saubere Signale benötigt!

Lo compré para reducir el ruido en un HUB USB y que provocaba que unos de los dispositivos conectados dejara de funcionar. Fue colocar uno en cada extremo y solucionado. Son de buena calidad, cierran bien. El único pero es el embalaje, es decir una bolsa de plástico muy frágil, eso sí, dentro del embalaje de Amazon

These things remove noise from audio cables. Easy to fit around the cable

Très bien pour l'utilisation qu'on lui demande. Attention si vous avez de fortes sections, ça n'ira pas (a vérifier dans les tailles).

Verkar vara lite klena. Och en del var svåra att stänga. Gjorde ingen större skillnad på störningarna jag ville dämpa.