I have the Promedia Ultra 5.1 for my computer that I no longer use. I want to beable to convert my sub to be used with my home theater system. Anyone have any idea how I may be able to do that. I don't want to have to buy a new sub when I have this one. Could I buy a Klipsch sub 10 amp and us it for the dual 8s in my current sub? Current sub is a 120v 500w