X2 Unterminated Speaker CableThe X-2 is a 14 awg speaker cable which uses semi-solid concentric-packed long-grain copper. In a conventional multi-strand cable distortion caused by electrical and magnetic strand interaction are compounded as each strand changes position within the bundle. In an Semi-Solid Concentric-Packed cable strands within the bundle maintain their fixed rigid relationships significantly reducing distortion. This copper is considered "Oxygen-Free Copper. " What this means is that the copper is actually oxygen-reduced but is not selected for low distortion. 's Long-Grain Copper means fewer impurities less grain junctions and lower distortion.