David Gilmour Live At Pompeii Dvd A electric guitar collection is actually much like a dynamic mike coil. For decades, vibrant microphones have already been sent with the voice coil attached with the principal of the microphone's transformer, and not referenced to soil (‘floating'). The microphone's situation is typically linked to the cable guard, that will be connected to the mike amplifier's surface (see Rane's site for more discussion).
By and big, powerful microphones are extremely calm products consequently of the combination of transformer solitude and balanced, flying transmission lines throughout, in addition to protected, humbucking coils.
So why don't you guitars? Instruments are notoriously affected by noise. Humbucking pickups are merely an incomplete (though crucial!) solution. The obvious alternative is to move the guitar pickup to a balanced output, as being a microphone. The same strategy was published this 2001 patent program such as David Gilmour Live At Pompeii Dvd?