Tributaries - 4ABM - Series 4 Balanced Audio Mono Cable (Single) Tributaries proudly introduces a new series of interconnect cables that are hand-made in Orlando, Florida. The Series 4 line of interconnect cables have a level of performance far above previous models of Series 3 and Series 5 cables. Tributaries has made major changes in the construction of the audio cables by changing the coaxial design to a perfect twisted pair geometry with solid 22AWG conductors which yields a more accurate signal transfer. Digital and Video cables employ a 75 ohm coaxial design with an upgraded solid conductor for a higher level of performance.