Jensen Guitar Speakers A guitar pickup is essentially just like a dynamic microphone coil. For many years, powerful microphones have already been sent with the voice coil attached with the primary of the microphone's transformer, and perhaps not introduced to ground (‘floating'). The microphone's situation is typically attached to the wire guard, that will be attached to the mike amplifier's soil (see Rane's site for more discussion).
By and large, active microphones are very quiet units consequently of the mix of transformer isolation and balanced, flying sign lines throughout, as well as protected, humbucking coils.
Therefore why don't you instruments? Instruments are once affected by noise. Humbucking pickups are just an incomplete (though important!) solution. The most obvious solution is to float the guitar collection to a healthy output, being a microphone. An identical idea was printed this 2001 patent software such as Jensen Guitar Speakers?