The Roots Best Album A best guitar collection is essentially similar to a vibrant mike coil. For many years, vibrant microphones have already been sent with the voice coil attached to the primary of the microphone's transformer, and not recommended to floor (‘floating'). The microphone's event is normally connected to the cable guard, that is connected to the microphone amplifier's ground (see Rane's site for more discussion).
By and big, active microphones are extremely quiet units as a result of the mix of transformer isolation and balanced, hanging sign lines throughout, as well as shielded, humbucking coils.
So why don't you instruments? Guitars are notoriously overwhelmed by noise. Humbucking pickups are only an incomplete (though essential!) solution. Well-known alternative is to move the guitar collection to a balanced result, being a microphone. A similar thought was printed this 2001 patent application such as The Roots Best Album?