So I managed to come across a Rythmik Audio DS12 subwoofer through a friend and I want to hook it up, but I don't know anything about large subs. I've tried hooking it up in the same way as my smaller one but that doesn't work. Does anyone know what I would I need to hook it up to my receiver (Yamaha HTR-5540). There's a picture of the back of the sub on their website in the product section which it won't let me link at the moment.