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 is said that Bedlam owns a subwoofer and that it is somewhere beneath the seating rake along with an amplifier. A signal line may or may not run from the tech box to said amplifier. The subwoofer apparently works intermittently. If you have more information, hit "Edit" now.
--Xander 12:11, 26 April 2008 (BST)