hi all, i have a question. I have a logitech 2.1 set of pc speakers. i dont know what model number but the the speakers plug into the sub and the sub goes to a line out on my audigy zs. I just bought an X-FI Platinum for my new comp and Im wondering if I could pick up some more speakers some where and plug them indivisually into my x-fi and achieve a 5 or 7.1 set up. I dont want to invest in a complete system because it will be expensive. so could it be done? what would I do? i dont understand because it seems the card has an input for left and right... but its one input. so i dont know.