Cheap Acoustic Basses A guitar pickup is actually similar to a dynamic microphone coil. For decades, energetic microphones have been wired with the voice coil mounted on the principal of the microphone's transformer, and maybe not introduced to soil (‘floating'). The microphone's case is usually attached to the wire shield, which can be attached to the mike amplifier's ground (see Rane's site for more discussion).
By and big, energetic microphones are extremely quiet units as a result of the combination of transformer isolation and balanced, flying transmission lines for the duration of, in addition to shielded, humbucking coils.
Therefore you will want to guitars? Instruments are once plagued by noise. Humbucking pickups are only a partial (though important!) solution. Well-known answer is always to move your guitar pickup to a balanced productivity, being a microphone. The same idea was published that 2001 patent request such as Cheap Acoustic Basses?