Could these work for a 3.5mm double coil wire?

These cores come in various sizes, that you need 3.5 mm is accommodated in a 1.5 mm cable at least up to 3.5 mm maximum, and if it does not work, you can use the core of 5 mm, which fits into a 3.5 mm cable at least up to 5 mm and I think that the cable you have should fit well in one of those two cores.

what frequencies do these absorb

that depends on the length of cable they are being used on. It's the cables that act as antennas, both radiating and receiving signals. It may take multiple units on your cables to reduce/eliminate the bothersome signals.

Will these filter out a radio station leaking into my audio

It depends on the strength and the proximity of the transmitting station. Under most conditions, you may be able to minimize or eliminate incoming radio frequency interference by clamping these onto your speaker leads. It may take more than one if the signal is very strong.

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20 Pcs Snap on Ferrite Core Cord Ring RFI EMI Noise Filter Black | Snap-on ferrite cores reduce RFI and EMI interference. Includes 5 sizes for 3.5/5/7/9/13mm cables to improve signal stability

20 Pcs Snap on Ferrite Core Cord Ring RFI EMI Noise Filter Black | Snap-on ferrite cores reduce RFI and EMI interference. Includes 5 sizes for 3.5/5/7/9/13mm cables to improve signal stability

Product ID: 39453900

⚡Improves signal stability

📶Reduces EMI/RFI noise

🔌5 sizes fit 3-13mm cables

MX$522

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Description

🔇 Silence the static, amplify your flow.

SNAP GO INSTALLATION - Tool-free, double-snap design makes setup effortless—clip on and instantly enhance your device’s performance.
SLEEK DISCREET DESIGN - Matte black finish blends seamlessly with your cables, maintaining a clean and professional workspace aesthetic.
VERSATILE COMPATIBILITY - Ideal for USB, HDMI, audio, power, coaxial, and more—perfect for your home office, gaming setup, or professional AV gear.
UNIVERSAL FIT FOR EVERY CABLE - Includes 20 snap-on ferrite cores in 5 sizes, perfectly tailored for cables from 3mm to 13mm diameter.
CUT THE NOISE BOOST THE SIGNAL - Effectively suppresses electromagnetic and radio frequency interference for crystal-clear data and audio transmission.

This 20-piece set of snap-on ferrite core cord rings includes five sizes (3mm, 5mm, 7mm, 9mm, 13mm) designed to reduce electromagnetic and radio frequency interference across a wide range of cables. Easy to install with a double-snap mechanism, these black ferrite cores improve signal integrity and data transfer speed for USB, HDMI, audio, power, and other cables, making them essential for maintaining a clean, interference-free professional environment.

Specifications

ASIN	B01N0AV746
Best Sellers Rank	#187,374 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #34 in Electromagnetic Interference Filters
Date First Available	November 9, 2016
Item Weight	4.2 ounces
Item model number	43237-2
Manufacturer	FORSUN
Package Dimensions	6.18 x 3.94 x 1.77 inches

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MX$522

Duties & taxes included

In stock

Sold byAmazon MexicoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Mexico.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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