I have a 2.1 system that I connected to the computer. I was able to connect two more speakers by using them as rear speakers on the computer. But, what I want is for them all to play the same tune at the same volume, not surround sound. Is this possible. Since there is only one front speaker input on the computer. Maybe I need a connector or what not. Please be specific when answering, Im pretty newbie at this. Thanks.