From the Blue Jeans cable web site:
"In some ways, the subwoofer cable interconnect is the least demanding application in Home Theater. While HD video demands cables able to carry high-bandwith signals, at tight impedance tolerances, the subwoofer cable has the relatively easy job of carrying a very low-frequency, very low bandwith signal. But a subwoofer cable has a critical job to do, and needs to do it well: keep out the hum."
Very honest from Blue Jeans.