AJ Sealed Designer is a sub-woofer design program for solving the required calculations for sealed speaker box designs. AJ Sealed Designer provides accurate theoretical calculations for speaker and box enclosure parameters with an easy-to-use interface. It also includes a box calculator to determine the dimensions of a box-shaped enclosure. Features of the program include information on the frequency response plots, the volume of the box, the resonance frequency of the box, half and low roll-off frequencies, a frequency response plot, and a power response plot.