Rode Psa1 Boom Arm A best guitar collection is basically just like a dynamic microphone coil. For many years, active microphones have been wired with the style coil mounted on the principal of the microphone's transformer, and perhaps not introduced to floor (‘floating'). The microphone's case is normally connected to the cable shield, which can be connected to the microphone amplifier's surface (see Rane's site for more discussion).
By and big, powerful microphones are very quiet products as a result of the combination of transformer solitude and healthy, hanging transmission lines through the duration of, along with protected, humbucking coils.
So why not guitars? Instruments are notoriously overwhelmed by noise. Humbucking pickups are only an incomplete (though crucial!) solution. The most obvious answer would be to float your guitar pickup to a balanced production, as being a microphone. The same thought was published this 2001 patent request like this Rode Psa1 Boom Arm?