Hi I wonder if anyone out there can help me with my predicament. I have a 5.1 set up at the moment using the Bose Accoustimass 15 speaker package. I am looking to upgrade to 6.1 discrete with a new amp. My problem is that the bose the 5.1 set up goes like this. 5 speaker leads from amp to sub then the five speakers leads run off the sub the the speakers. Does anyone know how I can manage to get a 6.1 set up from this. Do I have to buy a set of rear speakers and run them on the centre rear posts from the amp, if so how will this sound?? or is there a way of buying another set of bose speakers and running the seven speakers from the one sub woofer?