About $300-$500 aus dollar.\n\nI do have all the speakers, but just wanted to add the sub. I guess I can try add in the centre piece where the control is and try. Was hoping the stand alone sub would work.\n\n\nWell, being in Australia makes a huge difference. Most of the decent subs, are American made and designed and not widely available outside North America.\n\nI would not pursue that BA sb any more. It will be a much good as a sick headache anyway.\n\nI have had a look at what is available, and your prices are outrageous, even for absolute junk. I can't find anything any good, anywhere near your price range.