Futheda 20pcs Clip on Ferrite Ring Core Anti interference High frequency Filter RFI EMI Noise Suppressor with 3mm 5mm 7mm 9mm 13mm Inner Diameter Ferrite Cable Clip Black

I seen these on utube and thought I would give them a go not gonna break the bank at £11 running a 7.2.4 put them on my subs on my rca cables on my amp cable on my nvidia shield on my tv even on my extension cable and to be totally honest I have been blown away I don’t know how they work but my speakers have came to life I’m getting crisp clear sound I would highly recommend them for anyone that enjoy there sound

Has done absolutely nothing for my interference issue on a USB audio cable.

Noise gone

Didnt work