Bugera T50 Infinium A guitar collection is essentially just like an energetic microphone coil. For decades, powerful microphones have now been wired with the voice coil mounted on the primary of the microphone's transformer, and perhaps not recommended to floor (‘floating'). The microphone's case is typically attached to the wire guard, that will be linked to the mike amplifier's ground (see Rane's site for more discussion).
By and big, energetic microphones are very quiet products as a result of the mixture of transformer isolation and healthy, hanging indication lines through the duration of, in addition to shielded, humbucking coils.
So you will want to guitars? Instruments are once affected by noise. Humbucking pickups are only a partial (though important!) solution. The obvious option is always to float practicing the guitar pickup to a balanced output, being a microphone. An identical thought was printed this 2001 patent application like this Bugera T50 Infinium?