I hope I am not accused again of trying to schlep HMS cables here if I spread some information of HMS cables concerning a specific topic.
I will notify anybody that my opinion could be biased by the fact that I am the importer of said cables and I admit also that HMS is not the only good cable out there, (but probably one of the few cable brands, reasonably priced for that kind of performance)
I have discussed this topic of RFI/EMI rejection extensively with Dr. Strassner , since he said that rejection of EMI/RFI will be a growing issue in the future (more computers, more cell phones, more broadcasting towers, etc.)so he believes in extreme shielding of all of his cables, plus an additional 6 step filtering, which accumulates in a 99% rejection of EMI/RFI with his cables.
So if someone really suffers from that kind of problems, he should audition several brands of cables to find out, if cables are the cure for his problems or if investing money in a power conditioner will help. Actually the HMS power cords come with a build in power conditioner and cleaner, but there are several good brands available as stand alone power cleaners if you would like to invest more money. I also use the Stealth power cleaner along with said power cords.
I will repeat my Matra all over again: Audition, audition, audition.