M Box Mini A electric guitar collection is actually much like a dynamic mike coil. For many years, energetic microphones have now been sent with the voice coil mounted on the primary of the microphone's transformer, and maybe not called to ground (‘floating'). The microphone's situation is usually attached to the cable guard, that will be attached to the mike amplifier's surface (see Rane's website for more discussion).
By and big, energetic microphones are very quiet units as a result of the mix of transformer isolation and healthy, flying transmission lines throughout, in addition to protected, humbucking coils.
So why not instruments? Guitars are once plagued by noise. Humbucking pickups are just a partial (though crucial!) solution. The most obvious answer is always to move the guitar pickup to a balanced productivity, being a microphone. An identical idea was published this 2001 patent application such as M Box Mini?