Speaker Cables Messed Up A guitar collection is actually much like a dynamic microphone coil. For many years, energetic microphones have been wired with the style coil mounted on the principal of the microphone's transformer, and maybe not introduced to soil (‘floating'). The microphone's event is usually connected to the wire guard, that is connected to the microphone amplifier's surface (see Rane's site for more discussion).
By and big, powerful microphones are very quiet devices as a result of the combination of transformer isolation and healthy, floating transmission lines for the duration of, in addition to protected, humbucking coils.
So why not instruments? Instruments are once affected by noise. Humbucking pickups are just a partial (though important!) solution. The obvious alternative would be to float the guitar collection to a balanced result, just like a microphone. A similar thought was printed that 2001 patent program such as Speaker Cables Messed Up?