As it relates to the stuff that makes up the stuff we play with everyday. Why is it if you pinch a roach between a couple pennies everything works out fine? Nickels, Quarters, Dimes....not so much. It's no secret pennies haven't been all copper for quite a while. I remember my 4th or 5th grade teacher (80-82...ish?) explaining to us that they were no longer making pennies out of full-on copper but rather mostly zinc with a copper, or " copper looking " plating. I don't know why I remember that so much but I do and always will. Thank you Mr. Johnson, you're awesome and always will be. Anyway, back on topic, what is it about these metals that makes them good electricity workers? Wire, voice voils, pickups, and about anything that has to do with carrying juice from one place to the next, or more specifically, why they work out so well? Some dude figured it was worthwhile to sit down and wind this $#!+ somewhere between a few hundred and a dozen thousand or more times around, or inside of, a magnet, figuring it would do something and he was right? Hmmm.....? Did they try Nickel, Brass, Forged Steel like they make Japanese swords out of, regular Iron, etc., or did the math precede it, or did it come together with it? 8Metallurgy is an acient art. I realize some of this is rudimentary stuff to some of you but have you ever thought about the first peoole messing with this and how that lead to the things we make music with today? Hell, before that, you actually had to figure out the tones of things created by nature and how to make them sound beautifull...carving a piece of wood into just the right thickness and resonance and shape and grain to make a certain sound. Then these other guys come a along and do what amounts to alchemy or voodoo compared to how people were used to it before and makes all this radical sound. Could this be why some people weren't fond of rock-n-roll? So, if I was to re-invent the wheel, why is it that I should use copper, or maybe aluminum for my voice coil? What would happen if I ised varnoshed nickel?...or brass?....or iron?....or some $#!+ I put together you've never heard of?