Best Acoustic Electric String Guitar A guitar pickup is basically just like a powerful microphone coil. For many years, dynamic microphones have been wired with the style coil attached to the principal of the microphone's transformer, and not recommended to ground (‘floating'). The microphone's situation is usually attached to the cable guard, that is linked to the mike amplifier's soil (see Rane's site for more discussion).
By and big, active microphones are very quiet products as a result of the mixture of transformer solitude and healthy, floating indication lines for the duration of, along with guarded, humbucking coils.
So why not instruments? Guitars are notoriously overwhelmed by noise. Humbucking pickups are merely an incomplete (though essential!) solution. The obvious answer is always to float your guitar pickup to a balanced output, as being a microphone. A similar strategy was printed this 2001 patent application like this Best Acoustic Electric String Guitar?