Shure Beta 54 A best guitar collection is basically much like a powerful mike coil. For many years, dynamic microphones have already been sent with the style coil mounted on the primary of the microphone's transformer, and maybe not recommended to ground (‘floating'). The microphone's event is typically connected to the cable guard, which can be attached to the mike amplifier's ground (see Rane's web site for more discussion).
By and big, active microphones are extremely quiet products consequently of the combination of transformer isolation and balanced, flying transmission lines for the duration of, as well as guarded, humbucking coils.
So why don't you guitars? Instruments are once affected by noise. Humbucking pickups are merely a partial (though crucial!) solution. Well-known alternative would be to float practicing the guitar pickup to a balanced productivity, just like a microphone. A similar thought was printed this 2001 patent request such as Shure Beta 54?