Chicago RCASOLID LONG GRAIN COPPER (LGC) CONDUCTORS Solid Long Grain Copper (LGC) allows a smoother and clearer sound than cables using regular OFHC (Oxygen Free High Conductivity) copper. Solid conductors prevent strand interaction, a major source of distortion. The surface quality is critical because a conductor can be considered as a rail guide for both the electric fields within a conductor, and for the magnetic fields outside the conductor. LGC has fewer