Low-Frequency Effects (LFE) Channel



LFE.gif

The low-frequency effects channel (LFE) in a home theater system is more commonly known as a subwoofer. It is a speaker specifically designed to play only the lowest frequencies of audio, from about 120 Hertz on down.

Movie mixing engineers now mix specifically to send the deepest and most demanding bass to the LFE, instead of assuming that your larger front speakers can powerfully reproduce ultra-deep bass. All surround sound systems for home theaters need an LFE.

The most common placement for a subwoofer is in a corner, where it will be louder than if you place it elsewhere in a room. This isn't, however, the most accurate place for it. For that you will need to do the "subwoofer crawl." This involved placing the subwoofer at the location of your head when you're listening to music/movies (no joke) and crawling along the walls listening for where the bass sounds best.

There are three main kinds of subwoofers, active, passive, and in-wall. Check out HTR's subwoofer reviews.

All receivers and AV preamps have LFE outputs.  Visit our AV Receiver Review section and our AV Preamplifier Review section for more information.


Newest

Jun 29
Andover Model-One Turntable Music System Reviewed Andrew says that while the Andover Model-One music system may be a niche product aimed at a very specific customer, its design and ease-of-use make it one of his favorite record players.
Andover Model-One Turntable Music System Reviewed

Jun 29
In Terms of Accessibility, the AV Industry is Getting Worse, Not Better The disappearance of Windows control options and lack of accessibility standards are making it more difficult for home theater enthusiasts with physical disabilities to keep up with the rapid pace of technological change.
In Terms of Accessibility, the AV Industry is Getting Worse, Not Better

Jun 24
SVS SB-2000 Pro Subwoofer Reviewed SVS makes a compelling case for dual subwoofers with the SB2000-Pro, an affordable tour de force with performance way beyond its price.
SVS SB-2000 Pro Subwoofer Reviewed

Jun 24
Bowers & Wilkins Announces 705 Signature & 702 Signature Loudspeakers You don't see Bowers & Wilkins announcing new Signature Series loudspeakers all that often, so when it happens it's...
Bowers & Wilkins Announces 705 Signature & 702 Signature Loudspeakers

Jun 22
Tix Available Now for HiFi Summit, the World's First Online AV Tradeshow AV trade shows have always been a tradeoff. Sure, they can be great for business and business connections, as well...
Tix Available Now for HiFi Summit, the World's First Online AV Tradeshow