Roland Aira Tr 8 A guitar collection is essentially similar to a dynamic microphone coil. For many years, powerful microphones have now been wired with the voice coil attached to the primary of the microphone's transformer, and not introduced to floor (‘floating'). The microphone's case is normally linked to the cable shield, which will be linked to the microphone amplifier's surface (see Rane's internet site for more discussion).
By and big, powerful microphones are extremely quiet units as a result of the combination of transformer isolation and balanced, floating transmission lines through the duration of, as well as protected, humbucking coils.
Therefore why not guitars? Instruments are notoriously affected by noise. Humbucking pickups are merely a partial (though crucial!) solution. The most obvious option is to move your guitar collection to a healthy output, being a microphone. The same idea was published this 2001 patent request like this Roland Aira Tr 8?