Head Phone Extenders A guitar collection is basically similar to an energetic mike coil. For many years, energetic microphones have been sent with the style coil attached with the principal of the microphone's transformer, and perhaps not referenced to ground (‘floating'). The microphone's situation is normally linked to the cable shield, that is connected to the microphone amplifier's floor (see Rane's site for more discussion).
By and big, dynamic microphones are very quiet units consequently of the combination of transformer isolation and balanced, suspended sign lines during, as well as shielded, humbucking coils.
Therefore why not instruments? Guitars are notoriously affected by noise. Humbucking pickups are only an incomplete (though important!) solution. The obvious alternative is always to move your guitar collection to a balanced productivity, just like a microphone. A similar strategy was published that 2001 patent application like this Head Phone Extenders?