Bass Direct Box A best guitar pickup is basically similar to a vibrant microphone coil. For many years, powerful microphones have been wired with the style coil attached with the primary of the microphone's transformer, and perhaps not recommended to surface (‘floating'). The microphone's case is typically attached to the cable shield, which will be linked to the mike amplifier's floor (see Rane's web site for more discussion).
By and big, vibrant microphones are extremely calm units consequently of the mix of transformer isolation and balanced, floating sign lines through the duration of, along with protected, humbucking coils.
So why don't you instruments? Instruments are notoriously plagued by noise. Humbucking pickups are only a partial (though essential!) solution. The obvious solution is to move the guitar pickup to a balanced result, being a microphone. The same strategy was published that 2001 patent request such as Bass Direct Box?