Tube Bass Head A best guitar pickup is actually similar to a dynamic microphone coil. For many years, active microphones have been wired with the style coil attached to the principal of the microphone's transformer, and perhaps not recommended to surface (‘floating'). The microphone's case is typically connected to the cable guard, which is linked to the mike amplifier's floor (see Rane's internet site for more discussion).
By and big, powerful microphones are very calm units as a result of the combination of transformer solitude and balanced, floating indication lines throughout, in addition to guarded, humbucking coils.
So why don't you instruments? Instruments are notoriously overwhelmed by noise. Humbucking pickups are just an incomplete (though essential!) solution. The obvious answer is to move your guitar collection to a balanced output, as being a microphone. A similar idea was printed that 2001 patent application like this Tube Bass Head?