Carvin Sb 5000 A guitar collection is actually much like a dynamic mike coil. For many years, energetic microphones have been wired with the voice coil mounted on the primary of the microphone's transformer, and maybe not recommended to floor (‘floating'). The microphone's event is typically attached to the wire shield, which will be attached to the mike amplifier's ground (see Rane's internet site for more discussion).
By and large, active microphones are extremely calm devices consequently of the mixture of transformer isolation and healthy, hanging sign lines during, along with protected, humbucking coils.
Therefore why not instruments? Guitars are notoriously overwhelmed by noise. Humbucking pickups are only a partial (though crucial!) solution. The obvious solution is always to move your guitar collection to a balanced result, just like a microphone. The same thought was published this 2001 patent request such as Carvin Sb 5000?