Guitar Center Evansville Indiana A electric guitar pickup is actually much like an energetic mike coil. For many years, active microphones have been wired with the voice coil mounted on the principal of the microphone's transformer, and perhaps not recommended to ground (‘floating'). The microphone's situation is typically connected to the wire shield, which can be linked to the mike amplifier's floor (see Rane's site for more discussion).
By and large, active microphones are very quiet products as a result of the mix of transformer isolation and balanced, hanging transmission lines throughout, as well as shielded, humbucking coils.
Therefore why don't you instruments? Guitars are notoriously overwhelmed by noise. Humbucking pickups are merely an incomplete (though essential!) solution. The most obvious alternative would be to move practicing the guitar pickup to a balanced output, just like a microphone. A similar thought was printed that 2001 patent application such as Guitar Center Evansville Indiana?