Black Violin For Sale A electric guitar pickup is basically similar to an energetic mike coil. For decades, active microphones have been wired with the voice coil mounted on the primary of the microphone's transformer, and maybe not referenced to ground (‘floating'). The microphone's event is typically linked to the cable shield, that will be connected to the mike amplifier's ground (see Rane's web site for more discussion).
By and large, vibrant microphones are extremely quiet devices as a result of the combination of transformer isolation and healthy, suspended indication lines all through, as well as shielded, humbucking coils.
Therefore why not instruments? Instruments are notoriously affected by noise. Humbucking pickups are only a partial (though important!) solution. The most obvious option would be to move the guitar collection to a balanced output, being a microphone. A similar idea was published that 2001 patent program like this Black Violin For Sale?