Paul S Police Equipment A electric guitar pickup is actually just like a powerful microphone coil. For decades, active microphones have been sent with the style coil attached to the primary of the microphone's transformer, and not introduced to ground (‘floating'). The microphone's case is usually linked to the cable shield, which will be linked to the mike amplifier's soil (see Rane's site for more discussion).
By and big, energetic microphones are very quiet devices consequently of the combination of transformer isolation and balanced, floating transmission lines all through, as well as guarded, humbucking coils.
So why don't you guitars? Guitars are once plagued by noise. Humbucking pickups are only a partial (though important!) solution. The obvious answer would be to move the guitar pickup to a balanced result, as being a microphone. A similar strategy was published this 2001 patent program like this Paul S Police Equipment?