aftermarket fuse location


any thoughts/experience with the RELATIVE merits of upgrading fuses that lie in the powersupply path vs in the signal path, itself?  forgive me for applying "logic", as I know to trust ones ears, but it would make more sense that a fuse in the signal path would have more affect than a fuse on the incoming AC, acknowledging that AC powercords do, indeed, matter.....just interested in others experience
thanks
J
jw944ts
If you want to be logical, start with AC and the power supply being just as integral to the signal path as anything else.
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your responses and interest is appreciated, thank you.....AGAIN, I was looking for not theoretical but subjective observations as to which fuses seem to make greater/lesser change in sound.....