My home theater uses a Bag End sub setup. The processor is an ELF-1. In the front of the room (one on each side of the screen) are a pair of dual 18" sub towers and in the rear toward the corners are a pair of single 18" subs. Might replace the singles with duals next year.
Each pair are driven by a Crown K2. High pass is 70Hz and the cutoff is currently set for 12Hz. The Bag Ends are very efficient (100db SPL @80Hz @ 1W @ 1M) for a sub.
