Kawai Digital Piano Reliability A best guitar collection is basically similar to an energetic mike coil. For many years, powerful microphones have been wired with the voice coil attached with the primary of the microphone's transformer, and maybe not referenced to ground (‘floating'). The microphone's case is normally attached to the wire shield, that will be attached to the mike amplifier's floor (see Rane's website for more discussion).
By and large, active microphones are extremely quiet products consequently of the combination of transformer isolation and balanced, floating sign lines through the duration of, in addition to protected, humbucking coils.
So why don't you guitars? Instruments are once overwhelmed by noise. Humbucking pickups are just a partial (though essential!) solution. The obvious answer would be to float your guitar pickup to a healthy production, just like a microphone. An identical idea was published that 2001 patent request like this Kawai Digital Piano Reliability?