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Douglas Harper's Etymology Dictionary
woofer

"loudspeaker for bass notes," 1935, imitative.

Wiktionary
woofer

n. An electronic speaker that produces low-frequency sound.

WordNet
woofer

n. a loudspeaker that reproduces lower audio frequency sounds

Wikipedia
Woofer

A woofer is a technical term for loudspeaker driver designed to produce low frequency sounds, typically from 60 Hz up to 250 Hz. The name is from the onomatopoeic English word for a dog's bark, "woof" (in contrast to the name used for speakers designed to reproduce high-frequency sounds, tweeter). The most common design for a woofer is the electrodynamic driver, which typically uses a stiff paper cone, driven by a voice coil which is surrounded by a magnetic field. The voice coil is attached by adhesives to the back of the speaker cone. The voice coil and magnet form a linear electric motor. When current flows through the voice coil, the coil moves in relation to the frame according to Fleming's left hand rule, causing the coil to push or pull on the driver cone in a piston-like way. The resulting motion of the cone creates sound waves as it moves in and out.

At ordinary sound pressure levels (SPL), most humans can hear down to about 20 Hz. Woofers are generally used to cover the lowest octaves of a loudspeaker's frequency range. In two-way loudspeaker systems, the drivers handling the lower frequencies are also obliged to cover a substantial part of the midrange, often as high as 2000 to 5000 Hz; such drivers are commonly termed mid woofers. Since the 1990s, a type of woofer (termed subwoofer), which is designed for very low frequencies only, has come to be commonly used in home theater systems and PA systems to augment the bass response; they usually handle the very lowest two or three octaves (i.e., from as low as 20 to perhaps 80 or 120 Hz).

Woofer (disambiguation)

Woofer usually refers to a woofer, a large loudspeaker driver. It may also refer to:

  • Bob Davis (Australian rules footballer)
  • Wilderness First Responder, an individual trained in first aid
  • WWOOFer, a WWOOF(Willing Workers on Organic Farms) volunteer
  • "Woof" is gay slang used by guys to describe an attractive rugged manly guy. (i.e. You would say so and so is pretty "woof", or you could just say "woof" to the guy.) It can also mean "I dig you." etc.. It is usually used to, or when describing someone who is masculine but gay. It is the equivalent to how guys used to whistle at a woman in the 70's, but it is normally directed to another man, and the man is generally beefy and rugged. "Woofers" being the active plural form, usually used as a form of appreciation or sexual attraction.

Usage examples of "woofer".

He even caught the faint perfume of the bleep who had lured Woofer in.

But that should improve when Tweeter left his associate and went with Woofer.

So Woofer, the big male idiot, had followed her, and Tweeter had had to go along lest they be separated.

He had not liked losing possession of Woofer and Tweeter, or getting disconnected by the reverse wood, or losing his windbreaker jacket.

Over the radio, playing seductive music from subcutaneous woofers and tweeters.

No more boring nights of deep discussions on the lofty subjects of golf handicaps or 401K portfolios or mega-amp woofers.

She was perfectly willing to admire the sound quality, she was even willing to listen to Peter enthuse about woofers and tweeters and internal stabilization somethings, but she was not willing to listen to opera all the way into London, especially not with the two wer singing along.