Why gold?

Expensive? Unnecessary? Really? Gold has a warmer sound, silver more air and detail- all things considered. Of course there are more to the balance of cables and connectors then just "gold" and "silver" but all things equal (the exact same RCA or Wall Plug) the gold "item" will sound warmer while the silver will sound more open and airy.

Kijanki,
From what I have gathered, cables (when properly designed) are voiced with materials that compliment a given cable by things like conductor material, and connectors. An easy experiment (though not inexpensive) is to listen to two different Oyaide wall outlets- SWO-DX with a heavy silver plating compared to the SWO-GX with a two micron thick gold plating. This is very enlightening.

I have talked to two different cable manufacturers about this- Purist Audio Design and Synergistic Research. They confirmed when voicing their IC's they use different materials for their RCA's to get the balance they are looking for.