John Bonham Led Zep A electric guitar collection is basically just like a dynamic mike coil. For many years, powerful microphones have now been sent with the voice coil attached with the primary of the microphone's transformer, and not recommended to ground (‘floating'). The microphone's event is typically linked to the cable shield, which is attached to the microphone amplifier's soil (see Rane's site for more discussion).
By and big, active microphones are extremely calm devices consequently of the mixture of transformer solitude and healthy, flying indication lines during, as well as guarded, humbucking coils.
Therefore why don't you guitars? Instruments are notoriously plagued by noise. Humbucking pickups are merely a partial (though essential!) solution. The obvious answer is always to move the guitar pickup to a balanced productivity, just like a microphone. A similar idea was published this 2001 patent program such as John Bonham Led Zep?