Ok guys, total newbie here. I have a general question. I have a JBL ECS300(?) Home theater that I purchased a couple of years ago. It is a combo subwoofer and receiver. It is only Dolby Pro Logic. My question is can I hook a newer receiver up to it and use my current speakers and subwoofer? I plan on going with new speakers just not for awhile. But if I can get more use out of my current setup that would be great. It has two rca jacks on the back, for instance, one video that is going to my tv and the other is AUX that nothing is plugged up to. Can I just simply hook up a receiver with DTS or whatever to the AUX and go that way? Again sorry guys total newbie trying to figure out what all this stuff means. Thanks in advance for all your help.