Two 112's?
Yaaaay you!
For years now, everything Iv'e read online has pointed to the use of 2 subs being better than one in the majority of cases. THX says use 4!
Each of those articles also says just how difficult it is to attain very good bass performance, due to the nature of it's actual expense not too many wind up addressing it as it should be addressed.... or so they say.
I now tend to beleive they're right. I've also found the subs do more than just provide bass info... they support better the range of audio which lies above the 100 +/- hz area.
For 2ch and HT.
I'd very much like to be able to get another DD 15 for my 20 x 8ft room.
Enjoy.