Focusrite Isa 428 A guitar collection is actually much like a vibrant mike coil. For many years, dynamic microphones have now been sent with the style coil attached with the primary of the microphone's transformer, and perhaps not recommended to surface (‘floating'). The microphone's situation is usually connected to the cable guard, which can be attached to the mike amplifier's soil (see Rane's website for more discussion).
By and large, dynamic microphones are extremely quiet devices consequently of the mixture of transformer isolation and balanced, hanging indication lines all through, along with guarded, humbucking coils.
So why not instruments? Instruments are notoriously plagued by noise. Humbucking pickups are only an incomplete (though important!) solution. The most obvious answer would be to move the guitar collection to a balanced output, being a microphone. A similar idea was printed that 2001 patent program such as Focusrite Isa 428?