Mackie 24 8 A electric guitar pickup is basically similar to a dynamic microphone coil. For many years, dynamic microphones have been sent with the style coil attached with the primary of the microphone's transformer, and maybe not referenced to ground (‘floating'). The microphone's case is usually attached to the wire guard, that is attached to the mike amplifier's surface (see Rane's website for more discussion).
By and large, energetic microphones are very quiet products as a result of the mixture of transformer isolation and healthy, flying indication lines throughout, along with guarded, humbucking coils.
Therefore why don't you guitars? Guitars are notoriously plagued by noise. Humbucking pickups are only a partial (though important!) solution. The obvious alternative is always to move your guitar pickup to a healthy production, just like a microphone. The same idea was printed that 2001 patent application like this Mackie 24 8?