I just bought a Yamaha 5650 receiver and don't have speakers yet. I would like to try to hook up my Logitech Z-560 (4.1 computer speakers) to the receiver. The satellites have regular speaker wires which I can connect directly to the back of the receiver. However, I am not quite clear on how to connect the sub to the receiver. I'm assuming it goes into the subwoofer output of the receiver. Is this correct? And what kind of adapter would I need, as the sub has a 1/8" jack, and on the receiver's end is what looks like an RCA plug (white)?