The number which would make the round trip might be some whole number, only because of the incredible number involved. So some, just because of random behavior, even though it is VERY unlikely, might just by chance manage the amazing feat.
As mentioned electrons actually on average drift 1 cm per hour. and that is sort of the thing here. They are drifting in an A/C current about the same as if not any current. For DC current: "For an electric current of 1 ampere, 1 coulomb of electric charge (which consists of about 6.242 × 10to18 power (or 6,242,000,000,000,000,000) elementary charges (electrons) drifts every SECOND through any plane through which the conductor passes."
So if there is a slight DC current Even a tiny DC (Direct current) current of 0.00001 ampere ,there are a LOT of electrons flying around from amp to speaker and back.
OK for you math wizards:
How small a DC offset in volts, would be needed to allow an average of one electron per second to start the round trip from amp output to speaker, through speaker wires etc and back if the total distance traveled is 100ft. and how long would it take the electron, on average? (this is reasonable considering all the coils, and wires in the speaker. Assume it is a one driver speaker to avoid complications. (it has to be a pretty small offset!!!...And just so you know, I could not possibly answer the question I ask.)
