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Use of Ferrite Cores for EMI Reduction???

I've been doing a lot of research on the net lately about the use of Ferrite Cores to reduce ElectroMagnetic Interference (Yes, I are an engineer). It started when I bought a digital camera and there was a Ferrite Core at each end of the USB Cable AND one at the end of the power supply going into the Camera. The directions said that it was for noise reduction through those 2 cables! So I thought, HEY, I have cables in my Audio System...

This really got me thinking about the use of Ferrite Cores to significantly reduce the influence of any stray EMI that could be degrading the sound quality. Does anyone have an idea of this would help, OR does the EM shielding that already comes with most cables do the trick?

Any hardcore Electrical Engineering input would be GREATLY appreciated. Am I on to something worth trying, or just full of bunk??
hager_charles

Showing 1 response by phil0618

phil0618
49 posts
 
Hi,
If you want to experiment, I believe that Audioquest sells cores in two sizes for use on power and interconnect cables. I think they are called RF Stoppers or something similar. They are relatively cheap and come in simple snap on cases. I have them on my power cables to everything but in truth I never A/B'd to see if there was a difference. I think Stereophile gave them a thumbs up in their accesories category.
Phil
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