Quote:
Originally Posted by threEchelon 
Navships' wire isn't individually insulated, though you can buy wire that does have individually insulated strands. It's called Litz Wire. Even with litz wire, though, all the strands are used for the same signal.
Stranded conductors are used for flexibility or to minimize the skin effect, but many people believe that non-litz stranded wire muddies up the signal.
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Stranded conductors actually increase skin effect, since there's a larger amount of surface area in a greater number of conductors. A solid core conductor has far less skin effect than stranded, but it's also capable of carrying different loads more effectively and is far more flexible. This is why stranded is commonly used in power cable and ultra portable designs.
Also, I believe Litz wire employs a Litz braid, not simply a common strand. However, I'm not really an expert in cable geometry, this is just what I've read and what I've heard from Sean Casey of Zu Cable. I've also heard the statement about non-Litz wire and muddied signal, though i don't know how much i believe it.
For my recables, I use 4-conductor stranded wires for ease of use, and I like them a lot. Not very portable, but they sound great and I love the look.