WTF is LFE (Low Frequency Effects)? - ecoustics.com
Audio Equipment: Is there a method/device to connect a subwoofer LFE output from a stereo to a subwoofer that only has a pair of speaker-level inputs? - Quora
Should I Use My Subwoofer's LFE or Line Input Connections? | Sound & Vision
Subwoofer Cable and LFE Channel FAQ | Space Hi-Fi
Amazon.com: Acoustic Audio PSW400-10 Home Theater Powered 10" LFE Subwoofer Black Front Firing Sub,400 Watts
Acoustic Audio PSW250-6 Home Theater Powered 6.5" LFE Subwoofer Front Firing Sub | eBay
The Five Cs of Subwoofer Setup | Wirecutter
What is the LFE input and When to Use the LFE Input | REL
LFE Input Explained - Audiosolace
The Workhorse Powered GRS 8" Mini Subwoofer Kit 300 Watts
Should I Use My Subwoofer's LFE or Line Input Connections? | Sound & Vision