What do you mean by "too much air coming out of it?"
A subwoofer HAS to move air to make bass. How much bass a speaker puts out is simply a function of it's suspension travel and how much power you feed it.
Do you hear "chuffing" sounds? That's called "port noise" and is the sound the air makes as it passes over the sharp edge of the port's exit.
Also, were you playing really low test tones or watching a movie w/the sub cranked way up? Possibly, you were playing the sub at frequencies below the tuning frequency of the cabinet.
The port(s) in a ported enclosure tune the sub to a specific frequency, i.e. 30Hz. If you try to play the sub below it's tuning frequency, it becomes "uncoupled" from the enclosure and just starts flapping around as if it's not in an enclosure at all. You can blow the sub that way.
So, please elaborate so we can help.
It's chuffing sounds. The sub goes as low as 20hz (same as my reciever). It happens when watching movies and using the crossover tests. So I am guessing it's "port noise." How do I fix it?
