A subwoofer is a speaker specifically designed for the reproduction of very low frequencies (ie. bass).
Low frequencies need to be produced by large-diameter speaker cones which is why subwoofers are usually so large. It takes a lot of current which is why subwoofers usually have their own amplifiers. You can tell when a subwoofer is in operation because the building will be gently vibrating.
EUTC has in the past hired subwoofers for shows, usually when it is desirable that the audience by violently vibrated for dramatic effect.
It has been said that Bedlam owns a subwoofer and that it is somewhere beneath the seating rake. If you have more information, hit "Edit" now.
--Xander 15:33, 25 April 2008 (BST)