RCA cables have usually shield connected to ground on one side and it is enough to drain induced currents. Grounding shields on both sides (like in XLR cables) would provide better return but could also create ground loops.
regarding shielding
My question...some interconnects have the shielding only connected to one end of the cable ( often the pre amp end) .WHY? If both ends are not connected then there would be no circuit, no current flow and so would there be any effect at all?
Is the idea not to send any generated current from interference to ground so it does not interfere with the signal?
Is the idea not to send any generated current from interference to ground so it does not interfere with the signal?