ok. i figured out the dvd audio-(thanks kcarlile).

As for the sub is there anything else i should try before sending it back? When playing the LOTR:TTT when the wall is blown up during Helms Deep it is not loud at all. When i have the volume very loud(hurts ears) should the sub be kick ass so i feel it in my chest? Because right now i dont feel very much at all.

Once You Pop You Can't Stop