Fender Rumble 30 A electric guitar collection is basically much like an energetic microphone coil. For decades, energetic microphones have already been sent with the style coil attached to the primary of the microphone's transformer, and maybe not introduced to soil (‘floating'). The microphone's situation is usually attached to the cable guard, which can be attached to the microphone amplifier's ground (see Rane's site for more discussion).
By and large, vibrant microphones are very quiet devices as a result of the mix of transformer isolation and healthy, hanging indication lines throughout, along with protected, humbucking coils.
Therefore why not guitars? Instruments are once plagued by noise. Humbucking pickups are just a partial (though crucial!) solution. The most obvious alternative is always to float your guitar collection to a balanced output, just like a microphone. The same idea was published that 2001 patent application like this Fender Rumble 30?