I had problem worse that all of you guys in here.
I ended up having the sub faced in towards the walls.
Yesterday, i held my breath and just "kan kan lai" revamped my entire living room and rotated my whole setup.
Half way through I almost panic and wanted to give up as I'm not sure if it's gonna help me find a better sub and listening position.
From 8~1in the morning, I sat down when it's all done, ran YPAO and re calibrated with a SPL which I borrowed from "Aiman04" and surprisingly, YPAO did a good job, everything was spot on! And it sounded wonderful.
Yes I had a null area, "htkaki" and "Jack from SVS" was spot on.
Now I took down all my acoustic absorbers, and it still sounds great. Too tired to put them back on and experiment on the improvements.
My thanks to "htkaki" and "Aiman04" for the tools and insights.
Glad finally you've got what you're looking for from your sub. How's the sound compare to velo?