Bob, first a little comment on cable terminology: since the term "RCA" actually applies only to the plugs at the ends, not the cables themselves, it would make sense if even the most heavily-shielded coaxial cable terminated with RCAs was called an "RCA cable". Be that as it may, an "RCA cable" frequently is a thinner, lightly-shielded cable, and they're adequately shielded for short runs(e.g. player to receiver)in most home environments. Speaker wiring, running relatively high current into a low impedance is essentially immune from interference and has no need for shielding, but interconnecting cables carrying signals over a thousand times weaker generally require shielding.
No need to buy the high-priced stuff; the usual RG59-type cables from an inexpensive source such as
MonoPrice are fine. Incidentally, I bought the standard connector cable and it's fine; the "fancy connector"(unusually frank acknowledgment of the difference)shouldn't be necessary.
