Tc Electronic Polytune Clip A best guitar collection is actually much like an energetic microphone coil. For many years, powerful microphones have already been sent with the voice coil attached with the primary of the microphone's transformer, and not recommended to surface (‘floating'). The microphone's situation is typically connected to the cable shield, which can be connected to the mike amplifier's surface (see Rane's site for more discussion).
By and large, active microphones are very quiet products as a result of the combination of transformer isolation and healthy, suspended sign lines for the duration of, as well as shielded, humbucking coils.
So why don't you guitars? Instruments are notoriously affected by noise. Humbucking pickups are just a partial (though crucial!) solution. The obvious alternative would be to float the guitar collection to a balanced production, as being a microphone. The same strategy was published this 2001 patent request like this Tc Electronic Polytune Clip?