Phillipwu: I see your point about demagnification being an actual event but this issue has been brought up before on this forum and the takeway is that it is a non-issue. It would take many years before any minimal effect would take place and I guarantee that if you are like me and most normal audiophiles always looking for the next audio fix, your HFC cables will be long gone in favor of some new technology where we can hear a singer's tonsils vibrating like in real life. Witness all the "tweaks" on Audiogon, many of them patently absurd, if you don't believe that. There are also so many other factors in the sound of our system, I seriously doubt that I would notice any lessening of magnetic effect. Perhaps Rick Schultz has done some shelf life studies but having worked for a number of manufacturers, shelf life/expiration dates are largely arbitrary and put on products because they are forced to. I worked for a medical silicones company that put on their products arbitrary expiration dates, and when customers called to indicate their products had reached the expiration date, we charged them a fee to certify a later expiration date. We had no data to back it up and did nothing other than to relieve their concerns. I personally am not concerned about the loss of magnetic flux density of the HFC cables.