Looking to build a coupld subs for my home theater which is still in progress. I currently have an old Parts Express Titanic 12" in a roughly 3 cuft sealed box. I would like to leave it in my living room and build something better for the HT. The Titanic is running off a plate amp in the back of the box. I figure the new HT subs would run off an Inuke or similar. With my current screen wall i have room for a box 21x22x27 in both front corners. Ive read a couple builds with the SI15/18 and i like the price of the drivers, but thats not the ultimate deciding factor. I also thought about the slim THT and placing it in the back of the theater. So, looking for ideas, comments maybe 4 boxes in each corner?