When installing a subwoofer into your car audio system you need to build a box or enclosure for the speaker. Unless you are using a free-air subwoofer, the speaker is designed to perform inside a box with a certain amount of air space. If you look at the owners’ manual of the subwoofer, you will find the recommended air space in cubic inches that the subwoofer will need to perform. To find the air-space of a subwoofer box you will need to do a little math. Writer Bio
