Heres some subs I built a few years ago.
Dayton 12" in dual, with a OAudio 500w bash in each.
I use these to compliment a couple of Selah Audio
arrays I built a few years ago for my HT system....
its sitting dormant right now waiting for a reno of the HT room.
The rears are arrays as well but not quite as large, and the center
is also another Selah offering.
Yes they are one of the current Selah offerings. http://www.selahaudio.com/id168.html
They use HiVi drivers and Fountek ribbons
The rears were designed by Selah to compliment the fronts.
Also using HiVi, but a 4" with Dayton Planers.
They sound very nice, with the small 3" they are very dynamic
and are excellent for HT use. As stand alone for music they
work very well and offer a huge presentation, with a
soundstage and imaging that arrays are known for.