Silver-plated or single metal IC's?

Tvad,
Sorry to be so slow, I've been on location photographing a pharmaceutical plant.

Regarding your question "why" about my post (pasted below):

Everyone is forgetting one fact, you cannot have copper wrapped with Teflon. If you want Teflon surrounding copper, the copper must be silver plated.

Teflon allows oxygen to partially pass, resulting in oxidation. Too, the physical act of bonding Teflon to copper causes corrosion.

Copper oxide is a poor conductor, silver oxide is a good conductor. Silver does not react to Teflon and oxygen passing though results in silver oxide which is a better conductor than copper oxide.

There may be more to it than my short explanation, but these are the two basic reasons.

Here are a few links that cover the topic in a round about way, without resorting to the (easy to find) claims by dozens of cable manufacturers :^)

http://yarchive.net/electr/teflon.html

Printed Circuit Handbook

Permerability of Teflon to oxygen

Some thoughts.....

Silver plated copper tends to sound bright and aggressive at analog audio frequencies. It's great for digital and video because the frequency range is much higher, which means the signal primarily rides the silver layer near the skin

High purity solid copper can sound excellent

The dielectric, or lack thereof, can have a bigger effect on sound quality than the conductors themselves.

All of the very best (and most musical & not harsh or bright) cables I have heard are pure silver.

While Albert is correct about copper oxide and the potential issue of the permeability of Teflon, in my own experience taking apart 10+ year old copper cables, the actual degradation is so minuscule as to be non-existent. Even air-dielectric copper w/ Teflon tubes are ok for many, many years.

Purist Venustas cables I had were never bright or aggressive and they are silver plated copper. In fact, they were a bit too muddy in the lower midrange/upper bass area and not fast enough for my new speakers that I had to switch to all silver. Not that I needed aggressiveness, but the Purist's were too warm.

Dennis, perfect example of how cables plated with Silver are not necessarily bright. Purist is indeed neutral to warm tonal balance and if your system is already neutral to warm it may not be the best match.

Thanks folks. And Leica man, wow what a memory. I'd forgotten my own post!
I'm in Australia, and most audio stores here sell stuff prepackaged. There's a few places that are serious about their hifi, so I will try to follow my own advice and find some silver cables to listen to.