They were designed to reduce noise between components. (Pro audio, like mics and such) On distances of 3' that may be questionable. But they are a lot more hardy connection than RCA and some Pro Audio equipment, like the Behringer Feedback Destoyer Pro uses them. A lot of people use the FBD to help flatten response and deal with room modes for your subwoofer. (or other speakers)

I like them just because they make a better connection than RCA..