I just got my new Rava, and I only have my two Mini-monitor mains. No rears yet, and no center channel. I have purchased the cable to hook up my sub, and I know exactly where it will sit, but will I be able to use it yet? Right now I listen to everything in 2-channel mode, and have set up my speakers acordingly on my Onkyo 696. My mains are set to large, and other speakers are set to N/A, or none, or whatever the setting is. So can I hook up the sub, and set it up on the receiver, and hear it? If I listen in 5.1 mode, I will lose the voices in the center, so is there a solution? Or do I have to go out and spend big $$ now on the other speakers?