10w3....never heard a bad JL Stealthbox with this sub. ...But, where you gonna stick an amp? I think for that kind of money, I'm going to fit a custom box across the back seats with a 10" and an amp rack....it'll be a bit tight, but I think I can do a 450/4 to run the fronts/sub and still have enough volume for the sub with only about 8" depth....all packaged in a nice clean box.