TYPE 3 – Bi-wire The Inner Ear Magazine : The Wow Factor Features: 4 conductors in one cable. Connectors Oyaide banana plugs at speaker end. 45 degre WBT connectors at amplifier end. High density OFC (Oxygen Free Copper), high definition, multi strand wire . Its geometry yields a spectacular performance that is not compromised by long runs of cables. Bi-wired only.