Polytune Mini 2 A guitar collection is basically similar to a vibrant microphone coil. For many years, energetic microphones have now been wired with the voice coil attached with the principal of the microphone's transformer, and not recommended to floor (‘floating'). The microphone's case is normally connected to the wire shield, which will be linked to the mike amplifier's ground (see Rane's website for more discussion).
By and large, active microphones are extremely calm devices consequently of the combination of transformer solitude and balanced, floating indication lines throughout, in addition to protected, humbucking coils.
Therefore why don't you guitars? Guitars are notoriously plagued by noise. Humbucking pickups are just an incomplete (though important!) solution. The obvious answer is to float practicing the guitar collection to a healthy output, just like a microphone. The same thought was printed this 2001 patent application like this Polytune Mini 2?