What isn't practical about two subs playing sub frequencies instead of one and why would you bandpass speakers separately that are designed to play the same portion of that audio spectrum?

The OP simply wants to know if its possible to get a 2ohm load using two subs with different impedances, my answer is he can get close and to make sure each sub is kept in a seperate appropriately sized enclosure. What's so hard to understand about this? From there it's up to the OP to decide whether I know what I'm talking about or not.