Do Cables Wear Out?

SPL: "Electron particle flow," whatever that is, does not cause cables to break down, or wear in any way. Neither, in general, does passing a current through a wire. If it did, you'd have to rip out all the wiring in your house every few years and replace it.

I assume your friend is not trying to sell you cables. However, people who do sell cables are prone to this sort of nonsense claim (for obvious reasons). Your friend may have heard this somewhere and didn't realize he was being spun.

I wonder if the original poster feels his question has been answered.

Jwpstayman: If you want to respond substantively to a question, you first need to pay attention to the question. He wasn't asking if cables degrade over time; everything in the universe degrades over time. He was asking if particle breakdown occurs, and if loud rock music makes it occur faster. And it doesn't.

As for oxidation, this is a trivial problem. Oxidation occurs ver-r-ry slowly, except for the small section of the cable (if any) that's exposed to air. I have 25-year-old lampcord (which I once used as speaker cable!) that shows no visible signs of oxidation within the insulation, The exposed ends have oxidized--EXCEPT where they were in direct contact with speaker and amp terminals. This tiny bit of oxidation has a trivial effect on overall resistance.

OK, JWP, tell us how much the measured resistance of 8 feet of 12 AWG speaker wire changes over 7 years. You've made the claim, and you've told us you have a LOT of experience, so show us what you've got.

I was trying to make the point that copper oxide, while not ever reaching 100% in an older cable, does have some significant deterioration of electrical characteristics, which are certainly audible.

But you still haven't told us *how much* deterioration, despite repeated requests that you supply this information. Do you not know? Because if you don't, your assertion that the deterioration is audible doesn't hold up.

JPW: In other words, you have no idea how much "corrosion" a speaker cable would typically suffer over X years, and whether that corrosion would reduce conductivity enough to be audible. So your earlier statements were based on . . . what exactly? Nothing that I can see.

I and others have noted that even decades-old wire can have very little visible tarnish, let alone corrosion. Seems to me you're trying to invent a problem that isn't there.