Audiophile Fuses: Helpful or "Snake Oil"?

Fuses are a limiting factor in current flow but as a safety component they are required, so no you would not replace wire with fuses but try to hear if that limiting factor is minimised. If you do then you did fine, otherwise you lost some cash.

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Helpful if you hear a difference, whatever else if you don't, at least try once and keep same values to originals for safety.

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By the book yes. After that you are free to go.

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