Marshall 1936 2x12 A guitar collection is essentially similar to an energetic mike coil. For many years, dynamic microphones have now been sent with the voice coil mounted on the primary of the microphone's transformer, and not introduced to surface (‘floating'). The microphone's event is typically linked to the wire shield, which will be connected to the microphone amplifier's surface (see Rane's web site for more discussion).
By and large, dynamic microphones are extremely quiet units as a result of the combination of transformer isolation and balanced, floating indication lines throughout, along with protected, humbucking coils.
So why not instruments? Instruments are notoriously affected by noise. Humbucking pickups are only an incomplete (though important!) solution. Well-known answer would be to float practicing the guitar collection to a healthy output, as being a microphone. A similar strategy was printed that 2001 patent software like this Marshall 1936 2x12?