yes, I was referring to the dual 2 ohm voice coil option. It is 1 ohm stable I would say just go for that. Because if you upgrade to another sub down the road you will still be at no shortage for power. Some people say that it makes a difference, my opinon as long as you have clean power to the sub it will sound the same. I'm running my q15 on an aq 2200d at 1.4 ohms and it sounds great to me.