Roland Td 30 A guitar pickup is essentially just like a dynamic mike coil. For decades, vibrant microphones have been sent with the voice coil mounted on the primary of the microphone's transformer, and perhaps not introduced to soil (‘floating'). The microphone's event is typically attached to the wire guard, that is attached to the mike amplifier's soil (see Rane's site for more discussion).
By and large, vibrant microphones are very quiet devices consequently of the mixture of transformer isolation and healthy, floating sign lines throughout, along with protected, humbucking coils.
Therefore why not instruments? Guitars are notoriously affected by noise. Humbucking pickups are just a partial (though crucial!) solution. The obvious option is to move your guitar collection to a healthy output, being a microphone. The same strategy was published that 2001 patent program like this Roland Td 30?