here is a way of looking at bang for the buck.
compare the affect of replacing an amplifier with the affect of replacing a cable (speaker, ic or power cord).
if the affect upon the sound of a stereo system is more "pleasing" when replacing the cable, it would seem that the "new" cable has a more profound affect and could be considered as the wiser purchase , assume one can afford it.
my point is the component which has the greatest positive affect upon the sound of a stereo system should be given top priority. if it happens to be a cable, so be it.
i would therefore conclude that there is no formula to specify how much to spend for cables, relative to some other component.
compare the affect of replacing an amplifier with the affect of replacing a cable (speaker, ic or power cord).
if the affect upon the sound of a stereo system is more "pleasing" when replacing the cable, it would seem that the "new" cable has a more profound affect and could be considered as the wiser purchase , assume one can afford it.
my point is the component which has the greatest positive affect upon the sound of a stereo system should be given top priority. if it happens to be a cable, so be it.
i would therefore conclude that there is no formula to specify how much to spend for cables, relative to some other component.