An old friend of mine, Bob Fulton, RIP:
Bob Fulton (1925–1988) has been called a mad genius and a “screwball,” but it’s fair to say that during Fulton Musical Industries’ (FMI) relatively short lifespan, few designers have been more creative than he was. Gordon Holt was a big fan of the FMI 80 loudspeaker, but Fulton was also actively involved in the entire recording chain, including microphones, tape recorders, and record production via the Ark label. He was the first U.S.-based designer to focus on optimizing the amplifier-speaker interface. His research resulted in two models of cable, referred to as Gold and Brown, presumably on the basis of the color of the outer jacket. The Gold turned quite a few heads because of its price and performance. It was a massive cable which quickly gained a reputation for stupendous bass response and midrange clarity. It was said to be equivalent to 4-ga. wire, but its resistance (R) per foot was 0.001 ohms versus 0.00025 for 4-ga. copper wire. The Gold was a multi-strand twin-lead design with each polarity conductor adequately spaced apart to keep capacitance (C) quite reasonable at 28pF/ft. Inductance (L) was 0.19µH/ft., about the same as 18-ga. zip cord.