Bass Guitar Amp Casters A guitar pickup is basically just like an energetic microphone coil. For decades, active microphones have now been wired with the style coil mounted on the principal of the microphone's transformer, and not referenced to soil (‘floating'). The microphone's situation is typically connected to the wire guard, that is linked to the microphone amplifier's soil (see Rane's site for more discussion).
By and big, active microphones are extremely quiet products as a result of the mix of transformer solitude and healthy, floating sign lines during, as well as protected, humbucking coils.
So why don't you guitars? Instruments are once plagued by noise. Humbucking pickups are just a partial (though important!) solution. The obvious solution is to move practicing the guitar pickup to a healthy output, just like a microphone. A similar strategy was printed this 2001 patent application like this Bass Guitar Amp Casters?