Hi AnthonyTD

Thanks for the info.

These cables are starting to annoy me. I dissected my white AV set and what I found seems to be slightly different to your description.
For a start my AV quad shielded set are fully balanced (I made an error in my description of the RCA grey set as these are also fully balanced)
The differences between the two sets (AV white, RCA grey) that I have are the extra shielding around the individual conductor pairs. The conductor arrangement is the same, 4 individually transparent coated spiral wires, one spiral pair coated, one larger diameter plain solid coated wire and one uncoated rectangular twisted strip but the braid outer shielding in the AV white set is much sparser than on the RCA grey set which has a very dense tinned copper braided shield. Both sets have the Mylar foil (?) shield.

Anyone want to try to give me a rational explanation as to why what amounts to just extra shielding on one set makes these cables sound different given the shielding on both sets would seem more than adequate to completely reject any RFI?

Just in case anyone else is thinking about messing about with these cables be warned, they are a total pin in the arse to work with