Vox Ac4c1 12 A best guitar collection is actually similar to a vibrant mike coil. For many years, energetic microphones have been sent with the voice coil mounted on the principal of the microphone's transformer, and maybe not referenced to ground (‘floating'). The microphone's situation is usually linked to the cable shield, that is connected to the microphone amplifier's surface (see Rane's web site for more discussion).
By and large, active microphones are very calm devices consequently of the combination of transformer isolation and balanced, flying sign lines during, in addition to protected, humbucking coils.
So why not instruments? Instruments are once overwhelmed by noise. Humbucking pickups are just an incomplete (though crucial!) solution. The obvious option would be to float your guitar pickup to a balanced output, as being a microphone. An identical strategy was printed this 2001 patent request such as Vox Ac4c1 12?