Chord Signature was the biggest, stiffest, brightest cable Chord ever made. The conductors were oxygen free copper, the insulation was gas foamed Polyethylene, Shielding was a three layer braid and foil combination, effective to high frequencies and the outer jacket a flexible polyethylene. It was just flexible enough to fit into a system. It didn’t need a press release or a review, it took off so fast by word of mouth, that for a while there was almost a permanent waiting list.
It remained unchanged for about ten years, until Chord could apply improved building techniques and materials such as more efficient shielding, silver-plated conductors and PTFE insulation that would produce a more neutral tonal characteristic and a cable better able to carry detail, dynamics and timbre. This became Signature Reference.