Studio Monitor Producer A best guitar pickup is actually just like a dynamic mike coil. For many years, active microphones have been sent with the voice coil attached with the principal of the microphone's transformer, and not recommended to floor (‘floating'). The microphone's case is typically attached to the wire shield, which can be connected to the microphone amplifier's ground (see Rane's web site for more discussion).
By and big, active microphones are very calm units consequently of the combination of transformer isolation and balanced, hanging indication lines for the duration of, in addition to shielded, humbucking coils.
Therefore why don't you guitars? Guitars are once plagued by noise. Humbucking pickups are just a partial (though crucial!) solution. The obvious solution is to float your guitar pickup to a balanced productivity, being a microphone. The same thought was printed that 2001 patent program like this Studio Monitor Producer?