I am in the process of researching for my theater setup on what audio equipment to get. Gonna turn my garage into a dedicated home theater. Thinking about getting the Onkyo TX-NR3010 and not too sure about the speakers yet. Looking at the Klipsch RF-7 II system and adding two more surrounds. The question I have is i want to connect four Velodyne EQ-15 inch subs on each corner of the room, do I need a seperate amp to power them, how do I connect them? Would i just use two Y-connectors on the reciever pre-outs? I have seen many setups with one or more extra amps connected just never knew how they worked.