I don't use my sub much, and the system also provides the sound for the tv. What works ok for music isn't working for me with the tv as some shows these days for whatever reason are evidently putting quite some low end in their sound. My fronts, despite not being huge get on down there pretty low. But if I don't calibrate the system with the sub included it appears to over compensate. Then when I see music reviews of "not enough low end" I'm scratching my head until I remember, oh, yeah, my weird system.
I noticed after I moved my Front Height speakers to Middle Height and recalibrated (without the sub) is when this nonsense really started getting on my last nerve. So back to calibrating with the sub.
AVR calibration screwed or just my hearing? IDK.
Regardless, seems like Lfe is always a point of contention.