1. The orientation of the subwoofer driver and ports/passive radiators, changes the location of the source of bass sound waves with respect to front and side walls. Consequently, the orientation and distance to walls (and floor and ceiling) will affect the room gain and room mode excitation. Meaning, closer you get the driver to the wall/corner, more the room gain, giving some low end extension, some loudness, and more modal excitation, giving, more unevenness in FR. Moving the driver away from the walls/corner reduces the intensity of room gain and modal excitation. It is a balancing act, getting most out of the sub while trying to get the flattest FR in most locations.
I recommend trying all orientations, rotating clockwise, the left corner placed sub,
- facing room
- facing side wall
- facing corner (angled 45 degrees)
- facing front wall
- facing away from side wall
- facing away from corner (angled 45 degrees)
You can even try the other 45 degree offset positions, but, I suspect that will be overkill
.
Last but not the least, remember that phase and time alignment change depending on orientation of the driver. So, run auto setup or adjust those parameters as needed to achieve the result that pleases the most.
