yes, yes it does. this subwoofers extra feature, is its 3hp (whp, horsepower) motor. some call it a gimmick, but my car seems to go faster with this sub in the trunk.
the 4 tc9s with that power would probably have more output than the tc3hps. but not much. you would lose a ton of space for 4 drivers vs 2, and you wouldnt have significantly more output.