These are numbers based on replacement value for all gear and wires. I am including power distribution and conditioning in “cables” numerator.
Main system - hybrid home theater/two channel: 46% of system cost in cables.
Office system: 53% of system cost in cables.
I have purchased a lot of my gear used and assembled many of my own power cords, so these numbers reflect what I would have to pay retail to duplicate my current setups. I am guessing many folks look at these percentages and say I am heavily “over cabled”, but I think it’s just right. When I add new electronics, I can easily hear differences, if they exist, because my cable looms are reasonably capable.
kn