I have recently bought the above speakers (although no cables were supplied in the box). The subwoofer requires a seperate power source and has a power connector not dissimilar to a PC power cable, albeit minus the third prong. Does this matter ie can I use a PC power cable. Also when connecting the amp to subwoofer, the amp has a single phono connection whereas the subwoofer has two phono connections. I beleive that the feed is mono, therefore do a I need a phono cable that is 1 to 1 or a 1 to 2 phono cable?