Wire each sub in series inside it's box (8ohms). Now the wire that comes out of each box, connect them positives together on the amp's positive, and negatives on the amp's negative. That will give you a 4ohm load. Your amp can go as low as 2ohms, but your subs cannot do that. Unless you use only one sub, or use only one coil per sub like audiobaun said. I have done the one coil trick in the past without issues, but another member on this site recommended against that. I figure it has something to do with that unused coil creating power during motion and thus creating extra heat. What if I put a little light bulb on that coil to expend the energy, or better yet, a vu meter! It is an experiment I will try someday. But yeah, good luck.