To follow up on Jason's comment, some LFE sounds are "aperiodic", i.e., they have no upper harmonics and can't be located through hearing their directional upper harmonics. In contrast, bass musical instruments have such harmonics and that's why we can identify the position of a bass drum, etc., although it may be playing a fundamental note around a clearly non-directional 30-40Hz. The harmonics are played by the speakers, not the sub, and that provides the imaging to locate the instrument.

-----------------------------------

Enjoy the music, not the equipment.