Yeah, the subwoofer has pretty good thump to it. But bear in mind to get that bone rattling subsonic base you need a sub that will cost about three times this entire system. Long throw, high power LARGE speakers get pretty expensive. You can also increase the base response by adding smaller and cheaper subwoofers as well.
One EXCELLENT technique to use with a subwoofer is to put it right behind the seating area where you sit to watch movies. Creates kind of a "sofa shaker" effect.
Now if you are only looking for a real good add on subwoofer, here's what I would recommend:
http://www.earthquakesound.com/supernova15.htm
Get the 15 inch model. Trust me, you will LIKE it......
