Originally Posted by
Andyxlh
Not really,a mic uses a moving diaphragm to move a coil of wire near a magnet, producing electromagnetic induction of a small current,
Guitar pickups use the vibration of the string to disturb the magnetic field around the coil wrapped around the magnet. This changing of the field induces a tiny current in the wire. There's no moving diaphragm involved.
I'm guessing wax potting holds the coil of wire around the magnet still as if this vibrated it would induce a current in itself as it would move through the magnetic field as it vibrated. This current would not be induced by the vibrating string and would be non-musical. Noise of some frequency (much like a lot of my playing).
