You really don't get a good shot of the OB subs, but the front edge of the cabinet is ~30" from the front wall and pushed up against the side walls. The reason for this placement is practicality. My 2,7s are just inside each sub toed in slightly.
Is this a good, bad, terrible of meh location for OB subs?
My sealed subs are the two 10" are in the rear corners and the 15" sub is back center M/L.
My question regarding placement is, "If the current locations aren't optimal where should I start?"
A good method to determine placement is called a "sub crawl". Start with one of the sealed subs, turn the other two off. Put the sub you are working with in the listening position and play something with a good repeating base line through it. Get down on your hands and knees and crawl around the room listening for where the bass sounds good. Mark that spot with a piece of tape. Continue crawling, listening and taping until you have identified the location with the best bass response. This is where you want to place the sub. If that spot is not workable, use the next best spot. If that's still not practical, use the spot with the best response that is possible.
Now put the second sub in the listening position and, with the first sub also playing, repeat the process. rinse and repeat for the third sub. If you are going to have multiple listening positions, use a different position for the second and third sub if required.
In general, the closer a sub is to a boundry, the more output it will have. The more boundries, the more output so a corner gives the most, and possibly too much. Sometimes room usage and furniture placement limit the possible positions.
In my living room, I placed the sealed sub directly behind the couch which has it 3ft away from the closest wall, 6ft away from the wall behind it, 15ft away from the other side wall and 12ft away from the front wall. It works very well in this location. In the upstairs room with the OB speakers the sealed sub is next to the single listening position which is the only place it can go. May not be the optimal spot for bass performance but works well enough and doubles as a side table.