20x14x8 room.
Both 12s and now 1.7s. Laid out along the long axis. Three feet from sides, four from front room. My couch is about six feet from the back wall, so about 11 feet from ear to speaker.
Slightly toe'd in. Tweeters to the outside.
I used to run them with 90w Pass Aleph 5s ( clone monos )... now I use a pair of cloned 200w Pass Aleph2. As backup, I got a Conrad Johnson MF2100 200w solid state amp.
The one thing, besides getting them off the wall is to give them LOTS of clean power.
Have fun.