Produced By George Martin A guitar collection is essentially similar to a powerful microphone coil. For many years, active microphones have been wired with the style coil mounted on the primary of the microphone's transformer, and not referenced to surface (‘floating'). The microphone's situation is usually linked to the wire guard, which is attached to the mike amplifier's ground (see Rane's internet site for more discussion).
By and large, active microphones are very calm units as a result of the mix of transformer isolation and healthy, suspended transmission lines throughout, along with guarded, humbucking coils.
So why don't you guitars? Instruments are notoriously plagued by noise. Humbucking pickups are only an incomplete (though essential!) solution. The most obvious alternative would be to move the guitar pickup to a healthy output, being a microphone. An identical thought was published that 2001 patent request like this Produced By George Martin?