Guitar Pedals With Tubes In Them A electric guitar pickup is essentially just like a vibrant mike coil. For many years, active microphones have now been wired with the voice coil attached with the principal of the microphone's transformer, and maybe not referenced to ground (‘floating'). The microphone's event is typically connected to the cable shield, which can be linked to the mike amplifier's floor (see Rane's site for more discussion).
By and big, energetic microphones are extremely quiet devices consequently of the mixture of transformer solitude and healthy, suspended transmission lines throughout, along with protected, humbucking coils.
Therefore why not instruments? Guitars are once plagued by noise. Humbucking pickups are only an incomplete (though important!) solution. Well-known alternative would be to float the guitar collection to a healthy production, just like a microphone. The same idea was published this 2001 patent request like this Guitar Pedals With Tubes In Them?