Casio Privia 860 A guitar collection is essentially similar to a vibrant mike coil. For decades, dynamic microphones have been sent with the style coil mounted on the principal of the microphone's transformer, and not recommended to soil (‘floating'). The microphone's situation is normally connected to the cable guard, that will be connected to the mike amplifier's soil (see Rane's website for more discussion).
By and large, powerful microphones are extremely calm units consequently of the combination of transformer solitude and balanced, flying transmission lines all through, in addition to protected, humbucking coils.
Therefore why not instruments? Guitars are once affected by noise. Humbucking pickups are only an incomplete (though important!) solution. The most obvious alternative is always to float your guitar collection to a balanced production, being a microphone. A similar thought was published this 2001 patent application such as Casio Privia 860?