Huh, now we can use outdoor speakers to do testing of the audibility of corrosion in copper wires, when a much more accurate visual test is available to detect corrosion. Maybe the difference has more to do with the fact that you have cut off a small piece of copper and then the connection is better and you could have abtained the same result by cutting off the cable when new and not submitted to so-called corrosion.
Salut, Bob P.
Salut, Bob P.