Is there any way i can just buy a powered sub and also buy some other speakers like small book shelve speakers and just hook up those small speakers to the powered sub and then hook the powered sub into my TV? I dont want to spend the money on a whole surround sound kit when I dont use DVD players, also would this sound also be played out of my xbox 360? Can someone please clarify this for me? If i need any adapters or a specific kind of powered sub just tell me...What kind of out puts would the sub need to have for the speakers to connect to it? Thanks for your time.