Stupid Deal Of The Day Musicians Friend A guitar collection is essentially similar to a dynamic microphone coil. For many years, active microphones have now been wired with the style coil mounted on the primary of the microphone's transformer, and not recommended to ground (‘floating'). The microphone's event is usually connected to the cable shield, that is attached to the mike amplifier's ground (see Rane's site for more discussion).
By and large, vibrant microphones are extremely quiet products as a result of the combination of transformer isolation and healthy, hanging indication lines all through, along with guarded, humbucking coils.
So why not guitars? Instruments are once overwhelmed by noise. Humbucking pickups are only an incomplete (though important!) solution. The obvious answer is always to float the guitar collection to a healthy output, being a microphone. The same strategy was published this 2001 patent request like this Stupid Deal Of The Day Musicians Friend?