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Your cart is empty.Product name: Ferrite Cores Ring Clip-On RFI EMI Noise Suppression Filter Cable Clip Color:Grey Size : 0.14 inch/ 3.5 mm (inner diameter): about 0.98 x 0.51 inch/ 25 mm x 13 mm (outer size) 0.20 inch/ 5 mm: about 0.98 x 0.51 inch/ 25 mm x 13 mm 0.28 inch/ 7 mm: about 1.18 x 0.63 inch/ 30 mm x 16 mm 0.35 inch/ 9 mm: about 1.38 x 0.75 inch/ 35 mm x 19 mm 0.51 inch/ 13 mm: about 1.42 x 0.94 inch/ 36 mm x 24 mm Specification: 3.5MM inner diameter: suitable for 3.5-4.5mm cables; 5MM inner diameter: suitable for 5.0-6.5mm cables; 7MM inner diameter: suitable for 7.0-8.5mm cables; 9MM inner diameter: suitable for 9mm cables; 13MM inner diameter: suitable for 10.5-12.5mm cables; Packing included: 15 Pcs-9mm inner diameter
Barkyhill
Reviewed in the United States on July 20, 2024
These are simple filters for reducing some noise on wall-wart style power supplies and such. Often they will work best if you can wrap the wire through 2 times or more - IF you have small enough wire.They will fit on most USB, Mic cables and on RG-6, RG-58 & RG8x coax cable. Depending upon your noise problem, you may easily need several of these clipped on.This is a "your mileage may vary" situation, unless you know specifically the frequency of your interference and the target frequency of these ferrites. Unfortunately, the vendor does not provide much info on the target frequency range, but these will probably work best on the afore mentioned wall-warts.
Rob
Reviewed in the United States on July 1, 2024
The impedance of these was roughly in the same region as some others I purchased from Chinese vendors in the past. Note that these are not entirely inductive. The core losses show up pretty prominently, but not for wires that do not loop through the core. My uses are to try and attenuate common mode signals going up and down my ham radio antenna tower from WiFi equipment sharing the tower. I put these all over, but have actually never noticed much help in my situation, which was solved by powering down the noisy Ubiquiti AirFiber 24 GHz point-to-point units causing the RFI. These ferrite beads fit nicely over an Ethernet cable and are easy to take on and off.
RF
Reviewed in the United States on June 9, 2024
Ferrite cores are attached to audio interconnect cables, speaker cables, and power cables to prevent them from becoming antennae, picking up noise from surrounding electrical appliances, radio stations, your neighbor's electric lawn mower, etc., and adding noise and hash to your audio signal.I use the 9 mm size to attach to interconnects and more standard-sized power cables. They do make a difference in the audio by keeping cable noise out of the audio. This results in a lower noise floor and what audiophiles call a "blacker background." Because there is less electrical hash and extraneous noise, an additional result, for me anyway, is that the music seems more relaxed. as if your brain has to do less processing to separate the music from the noise.These are well-constructed, easy to install (at the source end of the cable, not the receiving end), and keep your cables free of noise. Ferrites are a well-known audio tweak and can work magic if your cables are susceptible to noise outside of your audio chain.
EricP
Reviewed in the United States on June 28, 2024
There is a ton of discussion online about whether these can be effectively used to quiet noisy power supplies on common guitar pedal boards. I wasn't really able to find any actual musicians who attempted to use these and succeeded or failed. The computer nerd set online seems to think there can be no effect on sound, but I don't really think they have wrapped their minds around how noise is created in a pedal board.My understanding is that using these on audio cables has just about zero effect. If you have janky jumper cables, you are going to have to deal with that separately. The thing is: noise mostly doesn't come from janky audio cables - it comes from interference in the A/C power.Long story short: They were super effective for my situation. I have a large board full of cheap clone pedals. I use cheap power supplies daisy-chained to the limit. This naturally creates a wall of white noise, especially when high-gain pedals are clicked on.I applied these cores to the main power cable coming from the wall socket and to the daisy-chained A/C cables going to my gain pedals and my compression pedal. There is now silence where there was white noise. The signal sounds great. I don't believe there is really any possibility of denigrating the signal as you are not messing with the audio cables, just cleaning up the juice. I gotta believe this has less audible effect on the signal than a common noise gate pedal.Tips:1) The internet says apply them close to the power supply. I only did this with the main power but it seems to be working perfectly.2) Wrap the cord a couple times or their will be zero change, allegedly.3) I used the 9mm janks for everything even though I ordered a bunch of sizes. I wrapped the bigger cable 2 times and barely got it closed. I wrapped the little guys three times and it was tighter than a duck's butt. So - 9mm was perfect for me. 7mm would have been too small. I wouldn't even be able to guess what you would need smaller than 9mm for.4) I was tempted to apply these to the PA amp, but the internet says application to too much current will cause overheating and other problems. I don't really understand any science/electrical stuff so I would say do your research before using these on anything that might draw a decent current. Amps especially spike current draw, so I assume it's a no go.I am going to recommend these to everyone. Super happy with the performance.
Michael B
Reviewed in the United States on June 23, 2024
Mechanically these attach as expected. They snap on and off (with the help of a small flat head screw driver) fairly easily. I did my best do do some RF testing using a Nano VNA but I don't think my set up was sophisticated enough. The best I could tell is that these reduced frequency interference from 10MHz to 250MHz reasonably but not so much after that.For general use - it appears that you might need 2-3 of these ferrites to get the impact you are looking for. That's not unusual - Fair Rites are similar. When I tried to do a back-to-back comparison, it appeared that the Fair Rites were better.Bottom line - these will likely work for general use - but if you are really trying to reduce EMI you should consider putting several on your lines - not just one.What would make this a better value, is for the manufacturer to give some specs on the ferrite material being used.
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