Hello! I currently have a set of 6 speakers. The DVD player that they are plugged into says '1 Ch Speakers Out' above the ports. Each speaker has a different coloured cable, for centre, left and right or something like that. There are 6 ports in total. I would like to use the speakers with my Mac, but of course there are no ports that the speakers can use. Is there some kind of adapter that combines the 6 cables into a 3.5mm headphone/earphone jack that I could then plug into my computer/iPod? Thanks.