I would drag the sub over, put a pillow on it and sit. Talk about a tactile response!
Hmm, ideally it would seem better to put the sub under the desk. Getting it as close to the speakers as possible would be beneficial. One problem, that is a huge sub! Maybe try placing it where the trash can is? Looks like you'll lose foot room, but try placing it there temporarily to see how it sounds. Sometimes there is no perfect solution. I rearranged my room once, just to try different placement options. But then again, I'm single and can get away with it.
