Interconnects, some have directional indicators, why?

local Yorkies?

Regarding my previous post, when I said:

During one half-cycle of each of the frequencies that is present the current corresponding to that frequency flows in via the positive conductor and out via the negative conductor. During the next half cycle of each of the frequencies that is present the current corresponding to that frequency flows in via the negative conductor and out via the positive conductor. The directions of the current in each conductor continue to alternate during successive half-cycles.

… it occurs to me that some may interpret this to mean that current flows in both directions at the same time, as a result of the multiple frequency components that will be simultaneously present in a music signal. To clarify, I did not mean that. At any instant of time current will flow in one direction, corresponding to the polarity (plus or minus) of the voltage that is being put out by the signal source at that instant. The contribution of each frequency component that is present to the total current may make that total either larger or smaller at a particular instant depending on which half-cycle of that frequency component is present at the particular instant.

Hopefully that clarifies more than it confuses :-)

Regards,
-- Al

mihorn wrote,

kraftsound
Linn K20 / Naim Naca 4 speaker cables are directional due to a burn in process at the factory. If they are connected the other way around they will adapt to that and after a couple of weeks they will sound the same as before. There is a small audible difference.

"If this is true also for other cables there is no actual inherit preferred direction in the cables
As I mentioned in previous post, the direction of metal cable is physically made and the sound doesn't change with the length of time. I heard sounds of many 40-50 years old metal wires in vintage gears melts like butter (in sound) in 1~2 minutes."

HiFi Tuning of all people used to state that (their) fuses were not directional, that they break correctly no matter which direction they were inserted. Of course HIFi Tuning now admits they were incorrect and that their fuses are directional. Hence the diode symbol with the uh, arrow on their fuses today. Synergistic Reseach, in a similar vein, used to state that their fuses that were subject to one million volts ("quantum tunneling") would be not be directional, you know, due to the million volts. Now everyone and his brother knows that Synergistic Research fuses are dirctional, one assumes even Synergistic Research. 

A lot of theorizing. Very little empirical reporting. 

2channel8
A lot of theorizing. Very little empirical reporting.

as fate would have it I wrote the first tests for the FAA to determine whether satellite communications delay would interfere with pilot to controller radio voice communication. Everyone and his brother knows voice (audio) signals over copper wire travel around 80% the speed of light which as everyone knows is 186,000 miles per second. There are other delays - i.e., through voice switches and other devices but the primary delay is the total up and down delay for a synchronous satellite at orbit of around 24,000 miles. Since the satellite delay is known to be 240 ms that means the velocity of the audio signal (voice) through free space is 186,000 miles per second. The speed of light. Now what is the only thing that can travel at the speed of light in free space? Answer at 11.