Trying to figure out a way to hook up a Bose 321 Acoustimass Series 1 to a Sony receiver to be used as a subwoofer for a friend. I've advised that this is probably not the best route if it is even possible, but they still want to try it. The input on the back of the acoustimass is the 15 pin proprietary cable. I've found a cable on ebay that is for an acoustimass 10, 15, 16 that has the same output, but I'm skeptical that it would work as it is for a 5.1 system where the 321 is supposed to be 2.1. Does anyone know if this is possible?