Roland Rd 300 A best guitar collection is basically similar to an energetic microphone coil. For decades, powerful microphones have been sent with the voice coil attached with the principal of the microphone's transformer, and not introduced to floor (‘floating'). The microphone's case is normally connected to the wire shield, that is connected to the mike amplifier's surface (see Rane's website for more discussion).
By and big, active microphones are very quiet devices as a result of the mixture of transformer isolation and balanced, hanging transmission lines for the duration of, along with shielded, humbucking coils.
So you will want to instruments? Guitars are once overwhelmed by noise. Humbucking pickups are just an incomplete (though crucial!) solution. The most obvious solution would be to float the guitar collection to a healthy production, being a microphone. The same idea was published that 2001 patent application such as Roland Rd 300?