Guild X 500 A guitar pickup is actually much like a vibrant microphone coil. For decades, dynamic microphones have already been sent with the voice coil attached with the primary of the microphone's transformer, and not recommended to soil (‘floating'). The microphone's event is normally connected to the cable shield, which will be linked to the mike amplifier's soil (see Rane's site for more discussion).
By and big, active microphones are extremely calm products as a result of the mix of transformer isolation and balanced, suspended transmission lines all through, along with shielded, humbucking coils.
So why don't you instruments? Instruments are notoriously plagued by noise. Humbucking pickups are just a partial (though crucial!) solution. The most obvious solution is always to move your guitar collection to a balanced production, as being a microphone. An identical idea was published this 2001 patent program such as Guild X 500?