The caps are cheap and keep dust out of the RCA inputs. Seems like a good idea. It is as simple as that.
RCA or XLR iInput Shorting Plugs or Pins
Looking for opinions on the routine use shorting or non shorting plugs, pins or caps on unused preamplifier or amplifier inputs. Does it really lower noise if inputs are not selected? Shorting vs Non shorting? Why are some manufacturers opposed to shorting plugs for routine use? Is there as much merit for XLR shorting pins as RCA shorting plugs? Thank you for your advice and opinions!