Need Help Connecting Logitech Z560 to New Intel Imac
I have a Logitech 4.1 z560 speaker setup that I would try to use with the Imac, if possible. My problem is that the connection from the speaker "control center" is actually two 3.5" mini phono jacks. Since there is only one audio output on the back of the Imac, I cannot figure out how to make this work. I can plug in just one of the connections, but I only get stereo sound coming from the front two speakers. Here is a link to the manual for the Logitech speakers:
http://logitech-viva.navisite.net/web/ftp/pub/pdf/speakers/z560.pdf
The connections I am referring to are numbered "4" in the diagram - described as "Audio input cable to PC - green & black plugs". I would appreciate any help. Thanks!
Intel Imac - Late 2007 Core 2 Duo, 24" 2.4 GHz