Pioneer Pl 990 A best guitar collection is essentially much like a vibrant mike coil. For many years, active microphones have already been wired with the voice coil attached to the principal of the microphone's transformer, and perhaps not recommended to ground (‘floating'). The microphone's event is typically attached to the wire guard, which is connected to the mike amplifier's floor (see Rane's web site for more discussion).
By and big, active microphones are very calm devices as a result of the mix of transformer isolation and healthy, suspended sign lines during, along with shielded, humbucking coils.
Therefore why not instruments? Guitars are notoriously plagued by noise. Humbucking pickups are only an incomplete (though important!) solution. The obvious option is to move the guitar pickup to a balanced result, just like a microphone. A similar thought was printed that 2001 patent application such as Pioneer Pl 990?