Here is the facts if you really want to know. There is a left and right channel for a reason. The RECORDING has a left and right BASS TRACK. If you use only a left or only a right from your source as the signal to your subs, HALF of the BASS track is NOT THERE to listen to.
Below 80hz the waves are so long separation is impossible, BUT you still have to play BOTH left and right to get the entire recorded piece. Unless it’s recorded in MONO and mirrors the bass track to both left AND the right, you had better use both left and right source signals IF you want to hear the WHOLE recording.
LFE is a combo of left and right bass tracks with a step baffel bump of +3-10db at 40hz and below.. AT THE SOURCE, not the plate amp.. LFE to LFE works great in HT more so.. Bombs exploding and really loud FARTS..
I say KNOW your equipment first, before using only HALF the signal that’s supplied to your subs as a signal.. It’s not only important to use left and right it’s important to know WHY!!!
With great respect and Regards, your welcome..