Used Warwick Bass A guitar collection is basically much like a vibrant microphone coil. For decades, dynamic microphones have already been wired with the style coil mounted on the primary of the microphone's transformer, and maybe not called to surface (‘floating'). The microphone's case is normally linked to the wire shield, that will be attached to the mike amplifier's ground (see Rane's site for more discussion).
By and big, vibrant microphones are very calm units consequently of the mix of transformer isolation and balanced, suspended sign lines for the duration of, along with guarded, humbucking coils.
So why don't you guitars? Instruments are notoriously plagued by noise. Humbucking pickups are merely an incomplete (though important!) solution. The most obvious solution is to float the guitar pickup to a balanced output, just like a microphone. An identical idea was printed this 2001 patent software like this Used Warwick Bass?