only time ur amp will see half the ohm loadage is when u bride the amp/ run it mono that means 1 positive on left side of the amp and negative on the right side of the amp u get the point. so yes if u had an single 4 ohm vc sub and wired it to the amp mono then yes each side of the amp will see an 2 ohm load. like i said ive heard these amp sweet spot is around 3.3 ohms so depending on box and port size. id keep the Dual 2 sub and wire it @ 4ohms mono. maybe ur imp rise wont be soooooooooo bad and u get around the sweet spot 3 ohms