Used Yamaha Motif A electric guitar pickup is basically similar to a vibrant microphone coil. For many years, dynamic microphones have now been wired with the voice coil attached with the primary of the microphone's transformer, and perhaps not called to surface (‘floating'). The microphone's case is normally attached to the cable shield, which will be attached to the microphone amplifier's soil (see Rane's web site for more discussion).
By and large, powerful microphones are extremely calm devices consequently of the combination of transformer solitude and balanced, floating indication lines all through, in addition to protected, humbucking coils.
Therefore why don't you guitars? Guitars are notoriously affected by noise. Humbucking pickups are only a partial (though crucial!) solution. Well-known alternative would be to float practicing the guitar collection to a balanced output, just like a microphone. An identical idea was printed this 2001 patent application such as Used Yamaha Motif?