I hear you guys talk about db levels all the time. I used the Video Essentials disk to calibrate my dual 20-39CS+/s1000 subs. I put the subs at +10db over the mains. I turned it up an boy they rock but ........... According to my Radio Shack metter I am not getting the high dbs you guys get. I turned this thing way way up. It was really loud and the Phantom Mencace made me feel like bugs were crawling on my hair. I have a room that is 20x18 with 12 foot ceilings. One side opens up to the hall way and dinning room and the other side has an eight foot opening to the kitchen at the back. I currently have the subs in the corners in the front. They registered 73.5db in the corners and 74db when put together in one corner. Someone told me that i might lose some lows or some of the flatness having them in different corners or that they might be canceling each other out. I currently have an Onkyo 595 reciever. Darn how loud is 110db. I can not imagine! What do you guys think? Thanks for your time!!!