first, a little quote so you realise what you are getting into here:
and now to answer you question--Originally Posted by the stickey that no one pays attention to
a quick google-ing shows that it is impossible-- let me explain:
parralling all vc's gives you 1 ohm at the amp, series-ing everything gives you 16 ohms at the amp
parralleling 2-4ohm loads(1 sub) gives you 2 ohms, and adding another 2 ohm series-ed load gives you 4 ohms at the amp(parallel would give you about 1 ohm)
series-ing the 2-4ohm loads gives you 8 ohms at each sub, parralling them at the amp gives you a 4 ohm load....
now, according to this link:
there is little reason to use both coils-- so just use 2-4 ohm vc's paralleled at the amp for a 2 ohm load.
now, i am still opposed to 2 ohm setups-- i think that they work everything too hard compared to 4 ohm and higher setups, and it is asking for trouble, but that must just be me...
edit: one other thing--most questions can usually be answered by a little google-ing, in fact, when i was typing in '4ohm' into google, the response '4ohm into 2ohm amp' popped up, and when i searched for 'use one voice coil on dc sub' the link i posted was the third one down..
and because the answer was so easy to find on google, it comes with a rant--for the low-low cost of the time it takes for you to make a new post!
a little time on your part, can help yourself farther than what i just did-- i just gave you the answer, so now, next time you don't want to search, you will just come here for a answer, and no-one learns anyhting from the experience...(the irony is that i am not a big supporter of spoon feeding, but here i am...)