Boss Power Supply A electric guitar pickup is actually much like a dynamic mike coil. For decades, active microphones have been sent with the voice coil attached with the principal of the microphone's transformer, and maybe not recommended to surface (‘floating'). The microphone's situation is typically connected to the cable guard, which can be linked to the microphone amplifier's floor (see Rane's website for more discussion).
By and big, vibrant microphones are very calm units as a result of the mix of transformer solitude and healthy, hanging sign lines through the duration of, as well as protected, humbucking coils.
So you will want to guitars? Instruments are notoriously affected by noise. Humbucking pickups are just a partial (though essential!) solution. The obvious answer is to move your guitar collection to a healthy production, as being a microphone. The same idea was printed this 2001 patent application such as Boss Power Supply?