Best Tube Amps Under 500 A electric guitar pickup is basically similar to a dynamic mike coil. For many years, dynamic microphones have been sent with the voice coil attached to the primary of the microphone's transformer, and maybe not introduced to surface (‘floating'). The microphone's situation is normally attached to the wire shield, which can be connected to the microphone amplifier's surface (see Rane's internet site for more discussion).
By and big, active microphones are extremely quiet units as a result of the combination of transformer solitude and healthy, suspended indication lines during, in addition to shielded, humbucking coils.
So why not guitars? Instruments are notoriously plagued by noise. Humbucking pickups are just a partial (though important!) solution. Well-known option would be to move the guitar collection to a healthy result, as being a microphone. A similar thought was printed this 2001 patent request such as Best Tube Amps Under 500?