Low Frequency Effects (LFE)

Low frequency effects, commonly referred to as LFEs, refer to an audio channel designed for home theater exclusively to handle the bass and low frequencies in a soundtrack. The LFE (.1) channel is the audio channel in the soundtrack specifically used for deep, low-pitched sounds, generally in the 3-120Hz range. LFEs are typically rendered through a powered subwoofer since most home theater speakers are incapable of playing down into the lower octaves with real authority.