Electric Guitar Amplifier Settings A guitar pickup is basically similar to a powerful microphone coil. For decades, powerful microphones have already been wired with the voice coil attached with the principal of the microphone's transformer, and not called to floor (‘floating'). The microphone's situation is usually connected to the wire guard, which will be attached to the microphone amplifier's soil (see Rane's web site for more discussion).
By and big, dynamic microphones are very calm products consequently of the combination of transformer isolation and balanced, hanging transmission lines throughout, in addition to protected, humbucking coils.
So why not guitars? Instruments are notoriously affected by noise. Humbucking pickups are just a partial (though crucial!) solution. Well-known solution is always to move your guitar collection to a healthy output, being a microphone. A similar strategy was published this 2001 patent application such as Electric Guitar Amplifier Settings?