For those not familiar with my IB , its a dual 18" Blueprint 1804s (avail @ acoustic-visions.com). The 2 woofers fire into my HT room and the back of the drivers are facing into my living room/kitchen etc. The area behind the drivers is indeed bigger than the the area in front of the drivers. Why is it so much louder behind the drivers? Now I really noticed this one day last week when I had the front and back door open but I am not sure if this was related or not. Maybe I should just turn the drivers around eh?