Dual mono with REL Subwoofer

[marcor]

Sub is sitting side by my seating position and the woofer is facing the speakers,  as I said, not optimal but still works.
First reaction from people is, "you cannot put the sub there!" after a little bit of listening "actually you don't really notice, do you?"

But again, you need to try in your room as mileage can vary.

By the way, human ear can only hear between 20Hz to 20KHz range, why REL making G1 to 15Hz if our ear cannot hear it?

For the same reason why they make loud speakers that go up to 25KHz... 
At least for the bass at the lower frequency you can say you can feel the vibrations.