Drum Trigger Module Dtx502 A electric guitar collection is actually much like an energetic mike coil. For many years, energetic microphones have already been sent with the voice coil mounted on the primary of the microphone's transformer, and perhaps not recommended to floor (‘floating'). The microphone's case is usually attached to the wire shield, which is attached to the mike amplifier's ground (see Rane's internet site for more discussion).
By and large, active microphones are very quiet devices consequently of the combination of transformer isolation and healthy, flying transmission lines through the duration of, in addition to guarded, humbucking coils.
So why don't you guitars? Instruments are notoriously affected by noise. Humbucking pickups are only an incomplete (though essential!) solution. The most obvious solution would be to move your guitar collection to a healthy output, being a microphone. A similar idea was printed that 2001 patent request such as Drum Trigger Module Dtx502?