Evans Onyx Drum Head A electric guitar collection is essentially similar to an energetic mike coil. For decades, energetic microphones have already been sent with the style coil mounted on the principal of the microphone's transformer, and not referenced to ground (‘floating'). The microphone's situation is normally connected to the wire guard, which is connected to the microphone amplifier's surface (see Rane's web site for more discussion).
By and big, powerful microphones are extremely calm units consequently of the combination of transformer isolation and balanced, flying sign lines throughout, along with protected, humbucking coils.
Therefore why not guitars? Instruments are notoriously affected by noise. Humbucking pickups are merely an incomplete (though crucial!) solution. The most obvious solution would be to float practicing the guitar collection to a balanced production, as being a microphone. The same thought was published that 2001 patent application such as Evans Onyx Drum Head?