Vox Keyboard Amplifier A guitar pickup is actually just like a dynamic microphone coil. For decades, energetic microphones have already been sent with the style coil mounted on the primary of the microphone's transformer, and not called to floor (‘floating'). The microphone's situation is typically linked to the wire shield, that is attached to the mike amplifier's floor (see Rane's website for more discussion).
By and big, dynamic microphones are very quiet units as a result of the mix of transformer isolation and healthy, floating indication lines all through, as well as guarded, humbucking coils.
So why not guitars? Instruments are once overwhelmed by noise. Humbucking pickups are just an incomplete (though important!) solution. The obvious solution is to float your guitar pickup to a balanced production, just like a microphone. A similar idea was printed this 2001 patent software like this Vox Keyboard Amplifier?