Chauvet Obey 4 A electric guitar collection is actually similar to a dynamic mike coil. For many years, powerful microphones have been sent with the voice coil mounted on the principal of the microphone's transformer, and maybe not introduced to surface (‘floating'). The microphone's situation is usually connected to the wire guard, which can be attached to the microphone amplifier's ground (see Rane's web site for more discussion).
By and large, energetic microphones are very quiet products as a result of the combination of transformer isolation and balanced, suspended transmission lines all through, in addition to shielded, humbucking coils.
So why not instruments? Guitars are once affected by noise. Humbucking pickups are only a partial (though essential!) solution. Well-known answer is to move the guitar pickup to a balanced result, as being a microphone. A similar thought was printed this 2001 patent application like this Chauvet Obey 4?