An active subwoofer has it's own amplifier, either one built into the subwoofer cabinet, or an external one supplied with the purchase. A passive subwoofer requires a separate amplifier which you must purchase yourself.

EDIT: I hate guys with faster fingers than mine.

Last edited by Ajax; 07/11/06 12:35 AM.
Jack

"People generally quarrel because they cannot argue." - G. K. Chesterton