Kawai Digital Piano No Power A electric guitar collection is basically just like a dynamic mike coil. For decades, active microphones have been wired with the voice coil attached with the primary of the microphone's transformer, and not referenced to surface (‘floating'). The microphone's situation is usually attached to the cable shield, that will be attached to the mike amplifier's ground (see Rane's internet site for more discussion).
By and big, vibrant microphones are extremely quiet products consequently of the mix of transformer isolation and healthy, hanging indication lines through the duration of, in addition to shielded, humbucking coils.
So why not instruments? Instruments are notoriously overwhelmed by noise. Humbucking pickups are only a partial (though important!) solution. The most obvious option is always to float your guitar collection to a balanced output, just like a microphone. A similar thought was printed that 2001 patent program such as Kawai Digital Piano No Power?