Guitar Center Drum Set A electric guitar pickup is basically much like a vibrant mike coil. For decades, energetic microphones have already been wired with the voice coil mounted on the primary of the microphone's transformer, and maybe not referenced to soil (‘floating'). The microphone's case is typically attached to the wire shield, that will be connected to the mike amplifier's soil (see Rane's website for more discussion).
By and big, powerful microphones are extremely quiet units consequently of the combination of transformer isolation and balanced, floating transmission lines all through, as well as protected, humbucking coils.
Therefore why not instruments? Guitars are notoriously plagued by noise. Humbucking pickups are merely an incomplete (though important!) solution. Well-known answer would be to float practicing the guitar pickup to a healthy production, as being a microphone. An identical thought was published that 2001 patent application such as Guitar Center Drum Set?