Led Gobo Projector A guitar collection is basically much like a dynamic microphone coil. For many years, active microphones have already been wired with the voice coil mounted on the principal of the microphone's transformer, and not referenced to surface (‘floating'). The microphone's situation is usually attached to the cable guard, that will be linked to the mike amplifier's floor (see Rane's site for more discussion).
By and large, powerful microphones are extremely calm products consequently of the combination of transformer isolation and healthy, floating sign lines throughout, along with protected, humbucking coils.
Therefore why not instruments? Instruments are notoriously plagued by noise. Humbucking pickups are only an incomplete (though crucial!) solution. The obvious solution would be to float the guitar pickup to a balanced productivity, as being a microphone. A similar idea was published this 2001 patent program like this Led Gobo Projector?