Shure Slx Wireless Microphone System A guitar pickup is basically just like a powerful mike coil. For many years, active microphones have now been wired with the voice coil attached to the primary of the microphone's transformer, and not recommended to surface (‘floating'). The microphone's case is normally connected to the wire guard, that is attached to the mike amplifier's floor (see Rane's internet site for more discussion).
By and large, powerful microphones are extremely quiet units as a result of the combination of transformer solitude and healthy, floating transmission lines throughout, as well as guarded, humbucking coils.
So why don't you guitars? Guitars are notoriously affected by noise. Humbucking pickups are just a partial (though important!) solution. The obvious option is to float the guitar pickup to a healthy result, just like a microphone. A similar idea was published that 2001 patent request such as Shure Slx Wireless Microphone System?