Led Zep 4 A electric guitar pickup is essentially just like an energetic microphone coil. For many years, active microphones have been wired with the style coil attached to the primary of the microphone's transformer, and perhaps not introduced to ground (‘floating'). The microphone's case is normally attached to the cable shield, that will be connected to the microphone amplifier's surface (see Rane's website for more discussion).
By and big, powerful microphones are very quiet devices as a result of the mix of transformer solitude and healthy, suspended indication lines for the duration of, in addition to shielded, humbucking coils.
Therefore why don't you guitars? Instruments are once plagued by noise. Humbucking pickups are only a partial (though essential!) solution. The obvious solution would be to move your guitar collection to a balanced productivity, just like a microphone. The same idea was printed this 2001 patent software like this Led Zep 4?