that connects to the left and right channel (I don't think they make them anymore). Look for them on ebay or crayslist. Or maybe a new av receiver instead.
I have a Yamaha RX-V670 A/V Reciever (5 ispeaker surround). I want to install a new surround sound speaker package that includes a sub-woofer. There aren't any sub-woofer connections on the back of the reciever; just front, center and rear. How would I connect the sub-woofer?