PSW10 QUESTIONS Please Help

ctp123

So I recently bought my PSW10 subwoofer and Im loving it!! This is my first subwoofer ever. I like Dubstep music and when I play it I notice this sound and air that comes out of the vent in the front. Is that normal or really bad? Because I can feel the little punches of air like 15 feet away. Any help from someone eho knows what they are doing and saying will be appreciated..
Im 17 and I saved up for this subwoofer so I cant get another one..