Source : WordNet®

woofer
     n : a loudspeaker that reproduces lower audio frequency sounds

Source : Free On-Line Dictionary of Computing

woofer
     
         (University of Waterloo) Some varieties of wide paper
        for printers have a perforation 8.5 inches from the left
        margin that allows the 3.5 inch excess on the right-hand side
        to be torn off when the print format is 80 columns or less
        wide.  If done with sufficient aplomb this makes a sound like
        the "woof" of a dog.  If the large part is the "woofer" then
        the small part must obviously be the "tweeter", following the
        names for the large and small cones in a hi-fi loudspeaker.
     
        These terms have been in use at Waterloo since 1972, but are
        unknown elsewhere.
     
        Compare {chad}.
     
        [{Jargon File}]
     
        (1997-03-21)