pardon the ignorance, for i did search but couldn't find exactly the answer i was looking for. i badly want to connect a set of klipsch 5.1 ultras to my iMac. im in the midst of getting an unopened set off of ebay. id go with the logitechs, but the klipschs just sound a heck of a lot better. so i know the single miniplug input and output connecters are digital as well, but what external hardware do i need to plug in order to get true 5.1 out of the klipschs? i dont want to get a receiver, and i cant make out if i can use the creative ddts-1000 straight out of the box (it looked as if it required a proper sound card for it to work). so in short, with a 24" imac, and a set of klipsch 5.1 ultras with the generic 3 miniplug connections, what do i need to make them work? thanks, and again, pardon the ignorance.