Digital Mixer Best A electric guitar pickup is basically much like a powerful mike coil. For decades, active microphones have now been wired with the voice coil attached to the principal of the microphone's transformer, and not referenced to ground (‘floating'). The microphone's case is usually linked to the cable shield, which can be linked to the microphone amplifier's ground (see Rane's internet site for more discussion).
By and big, powerful microphones are extremely calm devices as a result of the mixture of transformer isolation and balanced, hanging indication lines for the duration of, in addition to shielded, humbucking coils.
So why not guitars? Guitars are notoriously affected by noise. Humbucking pickups are just an incomplete (though essential!) solution. The obvious solution is to float your guitar pickup to a healthy output, being a microphone. The same idea was published that 2001 patent request such as Digital Mixer Best?