I'm looking for some advice on the placement of my subwoofer. I've had it in the back right corner for a while which gives me lots of output, but I'm getting some big nulls that my AntiMode cant fix. Attached is a quick diagram of my room. The box in the corner is my supercube 1 in its current location. The extension in the front (top) left of the diagram is actually a hallway that goes for about 8ft then opens up to another room and a staircase (the 4 ft wall in the diagram doesn't exist). I've read that subwoofers uses the opposite corner to reinforce the bass, so since I have no front left corner, is the back right a poor starting point? Also behind the couch is a sliding glass door. This is a basement so the floors are carpet over concrete. I plan on doing a sub crawl, but I'm hoping I can get some recommendations for a starting point. Thanks!