Tributaries - 6BW - Star-Quad Series 6 Speaker Cable - Bi-Wire (Single) Series 6 Bi-Wire Speaker cables begin with ultra-pure highly conductive oxygen-free copper (HC-OFC) developed specifically for audio applications. Conductors consist of multiple solid gauges that are mathematically and tonally chosen to support low, mid and high frequencies for a natural sounding cable. Individually insulating each conductor yields zero strand interaction and better sound quality. It is important to understand that music passing through the speaker cable, is actually an AC voltage, so when voltage passes through twisted wire, there will be additional magnetic fields. Tributaries Star-Quad design not only alternates the positive and negative signal conductors but also alternates the twisted lays in each multi-gauge conductor. Alternating lays cancels all levels of magnetic distortion. The end result is a neutral sounding cable. The 6BW is designed with heavy 14AWG High Conductivity Oxygen-Free (HC-OFC) copper conductors that are terminated with Series 6 spring clip banana plugs and/or spade lugs. The conductors have a unique individually insulated dual-gauge configuration for superior sound clarity.