Full Size Piano A best guitar collection is basically much like a vibrant microphone coil. For many years, dynamic microphones have already been wired with the voice coil attached with the principal of the microphone's transformer, and not called to surface (‘floating'). The microphone's case is typically attached to the wire shield, which is connected to the microphone amplifier's ground (see Rane's website for more discussion).
By and big, dynamic microphones are extremely calm products as a result of the mix of transformer isolation and balanced, floating sign lines during, as well as shielded, humbucking coils.
So why don't you guitars? Instruments are notoriously overwhelmed by noise. Humbucking pickups are only a partial (though essential!) solution. Well-known answer would be to move your guitar pickup to a balanced output, as being a microphone. An identical idea was published that 2001 patent request such as Full Size Piano?