ok, i was thinking about buying a speaker system for my mac, but i have a shelf audio system that the main unit does not work. i was wondering if they make an adapter to put the red and black coax cables that come from the speakers (very thin, and flimsy wires/common in car audio) to an adapter to plug into my macbook headphone jack. ive looked and cant figure it out. maybe the proper name for the wires coming from the speakers ?? thanks