I am having trouble locating an audio cable connector. My friend has an older Cambridge Sound sub woofer. It has two inputs, left and right. I remember my first Boston Acoustic subwoofer also had two inputs. I remember using a Y connector with two short cables. Is this something that I can anywhere or a special order item. My friends speaker system likes a boxes set from Cambridge Sound. I know it is nothing to write home about but it can sound better with a subwoofer. Any help would appreciated.