Logitech X-540 question?

i have the same speakers and setup cept it goes from 3mm to a red and white rca right into the tv sound output. you only get left and right sound when you enable matrix. unfortunately there is no way to make these surround sound sinse these are computer speakers and computer surround sound is slightly different than tv surround sound as far as plugs and connectors go. you should just buy a home theater or tv surround sound system if you really want surround sound