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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
Why are there two inputs on my subwoofer? - EarthquakeSound.eu
How do I connect my subwoofer? : PML Sound International
LFE Input Explained - Audiosolace
Subwoofer Pre Out to LFE-In or Sub-In? | AVS Forum
Receiver Has Single Subwoofer Output But Subwoofer Has Left and Right Inputs | BoomSpeaker