Speaker Cable Raceway A best guitar pickup is basically just like an energetic mike coil. For decades, active microphones have now been sent with the voice coil mounted on the primary of the microphone's transformer, and maybe not referenced to floor (‘floating'). The microphone's event is typically linked to the wire guard, that will be linked to the mike amplifier's surface (see Rane's web site for more discussion).
By and big, dynamic microphones are very quiet devices as a result of the mix of transformer isolation and balanced, flying indication lines during, as well as guarded, humbucking coils.
Therefore why not guitars? Guitars are notoriously affected by noise. Humbucking pickups are just an incomplete (though crucial!) solution. Well-known answer is always to move practicing the guitar pickup to a balanced output, being a microphone. The same idea was published that 2001 patent program such as Speaker Cable Raceway?