Menu
Home
People
Places
Arts
History
Plants & Animals
Science
Life & Culture
Technology
Reference.org
Low-frequency effects
open-in-new
<p>The low-frequency effects (LFE) channel is a band-limited <a href="/facts/Audio_signal/rFSTI9IF">audio track</a> that is used for reproducing deep and intense low-frequency sounds in the 3–120 <a href="/facts/Hertz/6Wshj5qm">Hz</a> frequency range. </p><p>This track is normally sent to a <a href="/facts/Subwoofer/RYD1sR7V">subwoofer</a>—a loudspeaker designed to reproduce very low frequencies. LFE channels originated in <a href="/facts/Dolby_Stereo/F4spaUxn">Dolby Stereo</a> 70 mm film, but in the 1990s and 2000s they became common in <a href="/facts/Home_theater_system/Yuue1prS">home theater systems</a> in order to reproduce film soundtracks found on <a href="/facts/DVD/7fJsHJrN">DVDs</a> and <a href="/facts/Blu-ray_Disc/zyPalhfG">Blu-ray discs</a>. </p>