Subwoofer Question

If properly placed and dialed in it shouldn’t. 

That's what I was thinking. Those frequencies are supposed to be non directional right?

Yes, it did for me. No matter where I placed it, I could always tell it's location even when the crossover was set at 40hz.  It bothered me to the point of getting a second sub to balance it. Happy now.

Yes, this is why I often say a Stereo Pair of Subs, located near your mains, front firing to get the directionality/imaging that exists, i.e. where's the Jazz Bass Player?

you get fundamentals, harmonics, and overtones, i.e. 60/120/180/240 ....

diminishing in volume while increasing in directionality.

https://www.google.com/search?q=fundamentals+and+overtones&oq=fundamentals+and+overtones&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIKCAEQABgKGBYYHjIICAIQABgWGB4yCAgDEAAYFhgeMggIBBAAGBYYHjIICAUQABgWGB4yDQgGEAAYhgMYgAQYigXSAQg3Mzg4ajBqN6gCALACAA&sourceid=chrome&ie=UTF-8

Had one sub, now two. Amazing difference,