Gibson Les Paul Custom Used A best guitar pickup is actually just like a dynamic mike coil. For decades, active microphones have been sent with the style coil attached with the primary of the microphone's transformer, and perhaps not referenced to floor (‘floating'). The microphone's event is normally linked to the wire shield, which can be attached to the microphone amplifier's floor (see Rane's internet site for more discussion).
By and large, vibrant microphones are very quiet devices as a result of the combination of transformer solitude and balanced, hanging transmission lines throughout, along with shielded, humbucking coils.
Therefore why don't you guitars? Guitars are notoriously affected by noise. Humbucking pickups are just a partial (though essential!) solution. Well-known solution is always to float practicing the guitar pickup to a balanced output, being a microphone. An identical idea was printed this 2001 patent application such as Gibson Les Paul Custom Used?