A:Answer I think I may have already answered this question. Maybe it was for someone else.
Why would you want to connect another sub to this? The frequencies that the sub reproduces are so low that they don't have any real directionality, so if you're worried about stereo be assured that it won't be an issue. Frequencies this low just fill up your room (it's why you can put a subwoofer anywhere in your room and not make a difference). If a second sub does anything, it will probably just make your low low frequencies overwhelming in the mix.
