I ordered one through eBay. It arrived today. It was broken. It looked dirty. It has double rear ports, both of which had come loose and were knocking about inside the cabinet. Is this normal, or have I been had? It was described as NIB. I attached the ports as they should be, and plugged in the speaker. But since hearing that unmistakable sound of damaged goods inside the box, I am temporarily insane and have no way of telling a good speaker from a bad one.