Someone has probably already mentioned this ... but when my speakers are well balanced with the subwoofer(s) you can't tell where the subs are or the point of origin for low frequencies ... instead, it makes the speakers sound huge ... or even more to the point, when perfect, you get that great 'wall of sound' effect, with sides and backs providing whizzing bullets, cavitating helicopter rotors, foot steps, etc.

Enjoy the Music. Trust your ears. Laugh at Folks Who Claim to Know it All.