Peavey Supreme Head A guitar collection is basically just like a dynamic mike coil. For decades, powerful microphones have already been wired with the style coil attached to the principal of the microphone's transformer, and not introduced to surface (‘floating'). The microphone's event is typically attached to the wire shield, which will be connected to the mike amplifier's soil (see Rane's website for more discussion).
By and big, dynamic microphones are very calm devices as a result of the mix of transformer isolation and healthy, flying transmission lines throughout, along with guarded, humbucking coils.
So why not instruments? Instruments are notoriously overwhelmed by noise. Humbucking pickups are just a partial (though crucial!) solution. Well-known alternative is to float practicing the guitar collection to a healthy production, just like a microphone. The same thought was printed that 2001 patent program like this Peavey Supreme Head?