How critical is the quality of a subwoofer cable to the overall audio performance. I'm just setting up a system using the Athena Point 5 speakers and I've got an Acoustics Research Pro Series 12' subwoofer cable. This is their low/middle series of cables. Will there be anything noticeable if I made an upgrade to one of their more deluxe cables? I'm thinking the subwoofer cable would have relatively modest demands on it but I could be wrong. Thanks for any advice.