The issues of fuse directionality and cable directionality involve numerous factors that are different, and discussions of the two issues should not be commingled IMO. Some of those differences are:
1)A fuse has just one conductor, while an audio cable has two or more.
2)The lengths that are involved are vastly different. Most cable parameters, and arguably most cable effects, are proportional to length.
3)An audio cable conducts an audio signal. In the majority of applications a fuse does not.
4)The nature of the contact surfaces that are involved in the two cases is very different.
5)If all wires are directional to a degree that is potentially audible it would seem expectable that the directional effects of a fuse wire would be swamped by the directional effects of the vastly longer associated wiring. In the case of a mains fuse that would include the wiring in the power transformer, the AC wiring within the component, the power cord, and arguably even the AC wiring inside and outside of the house.
6)Regarding empirical evidence that has been asked for in some of the posts above, in recent fuse-related threads Ralph (Atmasphere) has cited experiments he has performed which have determined that the same effects resulting from changing the direction of a fuse can be accomplished by rotating the fuse in its holder. And probably even more effectively. In both cases dimensional imperfections in the fuse and its holder result in differences in contact resistance, and consequently voltage drop is measurably and audibly affected.
FWIW my comments on fuse directionality have been provided in various recent fuse-related threads. See for example the first of my posts dated 10-28-2016 near the middle of this page.
Regards,
-- Al
1)A fuse has just one conductor, while an audio cable has two or more.
2)The lengths that are involved are vastly different. Most cable parameters, and arguably most cable effects, are proportional to length.
3)An audio cable conducts an audio signal. In the majority of applications a fuse does not.
4)The nature of the contact surfaces that are involved in the two cases is very different.
5)If all wires are directional to a degree that is potentially audible it would seem expectable that the directional effects of a fuse wire would be swamped by the directional effects of the vastly longer associated wiring. In the case of a mains fuse that would include the wiring in the power transformer, the AC wiring within the component, the power cord, and arguably even the AC wiring inside and outside of the house.
6)Regarding empirical evidence that has been asked for in some of the posts above, in recent fuse-related threads Ralph (Atmasphere) has cited experiments he has performed which have determined that the same effects resulting from changing the direction of a fuse can be accomplished by rotating the fuse in its holder. And probably even more effectively. In both cases dimensional imperfections in the fuse and its holder result in differences in contact resistance, and consequently voltage drop is measurably and audibly affected.
FWIW my comments on fuse directionality have been provided in various recent fuse-related threads. See for example the first of my posts dated 10-28-2016 near the middle of this page.
Regards,
-- Al