Interconnects, some have directional indicators, why?

georgelofi said:
Yes differences in dielectric, the way the different insulated conductors are wound/twisted together.
But not in the direction of the copper wire itself, as was stated!!

George what proof do you have of your claim the wire cannot be directional? Any actual experimentation building speaker wires or  ICs?








Quote:


In Reply to: Re: maybe rcrump... I don’t know, but... posted by Greg R. on September 29, 2000 at 19:47:48:

Solid core wire is extremely directional so just mark the end with some masking tape as it comes off the spool. Orient the wires so you have piece of masking tape at either end and terminate the wires. Throw it on a MOBIE or whatever overnight and then listen to it noting which way gives the highest image height. This is the correct orientation.

If you run the signal and return wires in the same direction you will end up with hot spots in the stage, normally at or close to the speakers, low image height and have a gaping hole in the middle of the stage...Keep in mind I am referring to the sound of the stage (reflections) not the individual instruments spread across the stage....Interconnects or speaker wires that have pianos wandering all over the stage normally have their signal and return going in the same direction....

http://db.audioasylum.com/cgi/m.mpl?forum=cables&n=12372&highlight=rcrump+wire+direction

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To state that wire has "directionality" is to toss aside the laws of quantum physics. First. the conductivity is proportional to current density and electric field, irrespective of the physical dimensions of the conductor. Second, the net drift velocity of the electrons is zero. If one direction in the material favored the other, there would be a net change in velocity in that direction and every wire would have an electric charge.

Energy transfer through the wire is by electric and magnetic fields, which move electrons to higher velocity or energy states. Electrons do not move from one end to the other, as water through a pipe, instead electrons are bound in a Fermi surface, which represents the energy state and momentum of the electron. When an electric field is applied, it "shifts" the Fermi surface away from the field and displaces electrons only on the surface of the field, accelerates those electrons on the displaced side to a higher velocity state and scatters electrons on the other side. Photons, lattice vibrations and impurities slow down the scattered electrons and cause resistance. This creates the space charge that propagates the applied electric field along the wire, and transfers electrical energy.

If you were to look at one point of the wire in an AC field, the Fermi surface distorts back and forth along that point, and not electrons flowing by like water. Again, the Fermi surface is not an actual surface but a representation of electron momentum. To say a wire has direction, you have to accept that a) the Fermi surface is not equally displaced by the same magnitude E field from both directions, and b) the scattered electrons on the other side see less (or more) lattice vibration and impurities for some reason.

So, why the arrows on cables? Mine have them because MIT placed network boxes on the wire and the direction of the signal is impacted by the passive devices of those networks -- which is audible if installed backwards. But putting arrows on plain wire is just decoration.

to make things even more confusing, consider the following. First, the audio signal is not the electrons. The audio signal can’t be the electrons because the audio signal moves too fast, near light speed in wire, whereas electrons only move very very slowly in wire - a meter per hour. Second, the electrons cannot travel at light speed under any circumstances or anywhere near light speed because of their mass, such as it is. Their mass prevents them from ever approaching light speed. In fact, we know there is actually only ONE thing that can travel at light speed (in a vacuum) and near light speed in metal conductors and it’s the VERY THING that the audio signal, the electromagnetic wave, comprises. But if it’s not electrons. what is it?!

A few people do listen to a piece of wire from a spool, installed backwards and forwards, and then mark the spool for the direction which sounds the best.

This wire on a spool is an air core inductor!!!!!, and not a straight piece of wire that’s "supposed" to be directional, take the wire off the spool so it’s straight and see which way sounds best? This needs to be on geoffkait's website. WHAT VOODOO!!!

Cheers George

GS5556 says:

To state that wire has "directionality" is to toss aside the laws of quantum physics. First. the conductivity is proportional to current density and electric field, irrespective of the physical dimensions of the conductor. Second, the net drift velocity of the electrons is zero. If one direction in the material favored the other, there would be a net change in velocity in that direction and every wire would have an electric charge.

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I personally was talking about micro changes or differences in how transients are expressed (when a dynamic force is applied, to a lattice arrangement like many of the wires we use in audio) depending on polarity. ie delta and polarity. Complex harmonics, which music is ...and wide band, through the ’native’ skin effect range, all this complicates the matter but exacerbates the ’transient interference’ issue.

Physics has no laws, just theory and exploration. Engineers have laws and dogma. Quantum physics is especially devoid of laws, it not being anywhere close to being defined.

As for polarity, or a one way, it’s just been done with light. Whod’a thunk it.

http://phys.org/news/2016-11-one-way-street.html