I am absolutely brand new to PA gear and went out and bought a Behringer XR18, Yamaha DXR12 mains and a DXS15 sub. Doh! I'll keep this thread alive in case there are others who could benefit from it. Question #1: What is the best way to connect these things? Balanced (mic cable?), unbalanced? Question #2: I saw a hookup diagram where PA goes to sub and then mains are pass through from sub to mains. Is this accurate? If you have any pics of what you've done, by all means please share. Right now this gear is sitting in the house so I can learn to use it but hope to get it out to some of our gigs soon.