We need to know if you have S4 or S8 versions. That designates whether the sub has a 4ohm or 8ohm voice coil. The Power Acoustik amplifier will not work well if you have S4 subwoofers. If that is what you have, I suggest you take them back and trade them in for S8 models. Tell the shop that you need "a final impedance of 4ohms with two subwoofers" they'll know to get you the S8 version of those subwoofers. When you get that done, you simply use only the Left + and Right - outputs on your amplifier. The Left + goes to the + on both subwoofers, the Right - goes to the - on both subwoofers. That has your amp bridged to 4ohm mono and your subwoofers will then receive full power from the amplifier when the gain is matched to it's source. Good luck with it. Have any questions along the way, shoot the question up and someone will get you an answer pretty quick.