You mean how much power does it need?
Don't get stuck on the "How much power I have" thing.... its not needed to get a good sounding system.
I have 2 6.5" Bostons in the forward portion of my doors and 2 6"x9" Polks in the rear of the doors along with this sub. The sub is run by an Alpine 2 channel amp bridged to the sub and the speakers are powered by a Kenwood 4 channel amp (I think 30 watts per channel) and it is plenty for the small confines of our trucks.
As I recall the tube I have has a max input of 100 watts.
Here is the specs:
http://www.crutchfield.com/p_204BT60...ures_and_specs