Directionality of wire

A simple resistance measurement of a length of wire taken from the spool reveals the proper direction for the entire spool. 

This indicates the simple resistance measurement will show differences in the resistance of the same piece of wire  depending on directionality, correct?  If so, would the manufacturer then orient the wire direction for their cables/fuses so the signal flow is in the direction with the lowest resistance?  Do you have any idea what the delta in directional resistance might be for a typical audio cable, say an 8-foot speaker cable with cross-sectional area of 12 awg?  How about expressed as a percent of the total resistance?  Is resistance the only electrical property affected by wire directionality?

@jea48 

Yes also to IC's.

Further to the above, I forgot that about 20 years ago, when I saw IC costs going stratospheric, I decided to do an experiment.

I built a cabinet for ARC SP10 pre-amp and Nakamichi CR7, which was a Faraday cage. I then noted that, at line levels, capacitance was the enemy, not inductance, so I found some very pure 4 nines silver 24 AWG and had it gold plated. 

I drilled holes in the bulkhead between the ARC and the Nak which were 2" apart and threaded bare wires through them, and then protected the wires with 0.375 teflon tubing, which touched the wires scarcely at all. Thus, compared to conventional co-ax of whatever manufacture, dielectric absorption was near zero, as was capacitance. Cables were 26 inches and terminated with ETI RCA's.

I was then in a position to conduct a single-blind experiment of theoretically optimal cables compared to Canare Starquad. An expert test subject (my long suffering wife) was unable to detect the difference reliably. Of less interest, because I was not a blind subject, I was also unable to hear the difference.

This is NOT definitive because the subject was not required to make many, many repeated observations for statistical analysis. But the point was clear: there ARE things that yield readily detectable differences, like turntables, tonearms, cartridges, SUT's, tubes, pre-amp topology, power supplies, capacitors, resistors, amplifier topology, and speakers.

So the latter is where I spend my money.

So, Jea, just for the record, the test has been done.

 
mitch2
Geoffkait: A simple resistance measurement of a length of wire taken from the spool reveals the proper direction for the entire spool.

This indicates the simple resistance measurement will show differences in the resistance of the same piece of wire depending on directionality, correct?

>>>>Yes

If so, would the manufacturer then orient the wire direction for their cables/fuses so the signal flow is in the direction with the lowest resistance?

>>>>Fuses are not controlled for directivity as far as I know, only cables with directional arrows. That's why fuse manufacturers tell customers to try them both ways. Yes, the lower resistance would be in the direction of toward the speakers.

Do you have any idea what the delta in directional resistance might be for a typical audio cable, say an 8-foot speaker cable with cross-sectional area of 12 awg?

>>>>No

How about expressed as a percent of the total resistance?

>>>>>Dunno.

Is resistance the only electrical property affected by wire directionality?

>>>>Obviously, the reciprocal, conductivity.

stfroth, that's a shame.