Why Do Subwoofers Blow Air?

If you own either a home or car audio subwoofer, you might be wondering why does the port on the box blow air?

A subwoofer is the largest type of speaker in the audio industry and is specifically designed for low bass frequencies. The type of sound that booms when you play rap music or watch a movie during an explosion. Subwoofers can be fitted into an enclosure with a ported design. This port allows the bass to be optimized for a certain frequencies to determine the type of bass you want from it. During playback, the cone will move back and forth generating air pressure. All this pressure is then forced out of the aero port, which is why it blows air.