Hi all, I would like to knock out a wall in our 11'-7" x 11'-3" basement room to make it 11'-7" x 18'-0". The wall I will be knocking out is a load-bearing wall. Because of this, I need to install a support beam across the newly opened gap. Here's an illustration of the future room: The dark gray vertical line down the middle of the room (just off centre) is the current wall, where the header will be. My city's regulations require that I use 5 (five!!) 2x12's for the beam. So that means a drop of 12 inches from the ceiling. The ceiling is only 7'-7" high. So there will be a beam a full foot below the rest of the ceiling running through the middle of the room. My question is: will a one foot drop noticably affect the accoustics of the room -- in particular, will it affect the Front 1 and Front 2 speakers with respect to those sitting on the couch? A subwoofer will likely be placed on the front corner too -- will that be affected too my this beam? The front speakers are floor standing Mirage OM-10's while the rears are matching OM-R2's mounted on the wall approximately one meter above ear level. The center channel is an OM-C2. (The aforementioned sub is a Paradigm 10" sub that I currently own, but is not in the illustration as I have not figured out where that will be placed yet.) Thanks for any help or input you folks may provide!