Signal direction

i once asked homegrown audio why they did not mark the direction on their interconnects and was told whatever direction you burn them in is correct but if you reconnect them in the opposite direction they have to re-burn in in that new direction. since then i notice they put arrows on their interconnects.

Excellent! That's good news. Thanks for your imput. Now if I can get him a new amp everything will be wonderful.

I agree that you may find the cables need breaking in again. This is the only directional issue that may or may not appear and goes away with use.

Theoretically saying every conductor has chrystalic malstructures of the semi-conductor nature("impurities")
Let's consider these impurities as diodes(one-way conductivity devices) randomly connected in different directions of the current flow.
Even the cleanest 99.999% cooper conductor has these impurities despite of having almost no oxides. Within the break-in time we bypass such micro-diodes that are in direct connection and "electrically break" micro-diodes with the opposit connections relatively to the current flow.
That's why cables will have to be reburn for the opposite direction.
How it is different sonically?
I do not believe that human ear is capable to distinguish it even on $10k amps with $10k speakers for example.