First thanks to everyone who has replied.
Just to be clear, the RCA that I'm talking about is those analogue composite cables and not the coaxial cable or RCA interconnect.
And also I'd like to point out that I've just listened between using the Van den Hul Thunderline composite stereo audio cable and a Monster fiber optic cable at home and it just seems that I find the music sounds better when I use the composite cable.
So my original was just to get feedback from others on whether they find any differences between the two types of cables.
