Alembic Bass 5 String A guitar pickup is essentially just like a dynamic mike coil. For many years, active microphones have already been wired with the voice coil attached to the primary of the microphone's transformer, and maybe not referenced to surface (‘floating'). The microphone's event is normally linked to the cable guard, which is attached to the mike amplifier's floor (see Rane's website for more discussion).
By and large, energetic microphones are very quiet units consequently of the mixture of transformer solitude and balanced, flying sign lines during, as well as guarded, humbucking coils.
So why not guitars? Instruments are once overwhelmed by noise. Humbucking pickups are merely a partial (though important!) solution. Well-known answer is to move your guitar pickup to a balanced output, being a microphone. A similar thought was published this 2001 patent program like this Alembic Bass 5 String?