Ssl Alpha Channel A guitar pickup is basically similar to a powerful mike coil. For many years, energetic microphones have now been sent with the voice coil attached with the primary of the microphone's transformer, and not called to ground (‘floating'). The microphone's situation is usually linked to the cable guard, that will be connected to the microphone amplifier's surface (see Rane's website for more discussion).
By and big, powerful microphones are very calm products consequently of the mix of transformer isolation and balanced, hanging sign lines all through, along with shielded, humbucking coils.
So why not instruments? Guitars are notoriously overwhelmed by noise. Humbucking pickups are only a partial (though crucial!) solution. The most obvious solution would be to move the guitar pickup to a healthy production, being a microphone. An identical idea was published this 2001 patent request like this Ssl Alpha Channel?