Cardboard Carrying Case A guitar collection is essentially similar to a powerful mike coil. For decades, powerful microphones have already been wired with the voice coil mounted on the principal of the microphone's transformer, and maybe not recommended to ground (‘floating'). The microphone's situation is typically connected to the cable shield, which is linked to the microphone amplifier's floor (see Rane's internet site for more discussion).
By and large, active microphones are extremely quiet devices as a result of the mix of transformer isolation and healthy, floating sign lines through the duration of, along with guarded, humbucking coils.
Therefore why don't you instruments? Guitars are once plagued by noise. Humbucking pickups are only an incomplete (though essential!) solution. The most obvious alternative is always to move your guitar collection to a balanced productivity, being a microphone. A similar thought was printed that 2001 patent request like this Cardboard Carrying Case?