Wired Keyboard Not Connecting A electric guitar collection is actually just like an energetic microphone coil. For many years, powerful microphones have now been wired with the voice coil mounted on the primary of the microphone's transformer, and maybe not called to soil (‘floating'). The microphone's situation is typically linked to the cable guard, that will be connected to the mike amplifier's ground (see Rane's website for more discussion).
By and big, active microphones are very calm units as a result of the mix of transformer isolation and healthy, floating sign lines throughout, in addition to guarded, humbucking coils.
Therefore you will want to guitars? Instruments are notoriously plagued by noise. Humbucking pickups are just an incomplete (though important!) solution. The obvious option would be to move your guitar collection to a healthy output, just like a microphone. An identical idea was printed this 2001 patent application such as Wired Keyboard Not Connecting?