To use this calculator, enter the volume of your enclosure (in cubic feet) in the first box. Then click the 'Dimensions' button to see the proper internal dimensions for your new speaker box design. Box volume = (Ft 3) Depth = inches. Subwoofer box design online software. Subwoofer box calculator online. The calculation of sealed, bass-reflex, bandpass boxes by Thiele-Small parameters. Easy and convenient build your box.
![Box Box](http://i48.tinypic.com/2pyx98i.jpg)
.This calculator will determinewhat length port to use in yourported enclosure.S electwhether you are using a round or slottedport for you box design.E nterthe number of ports you are using, theinternal airspace of your box, thentuning frequency you wish to use, andthen hit calculate button.If you are using a slotted port, selectsquare under port type, then answer yesunder are you using a slotted port.Then under square vent, type in theheight and width of the port you wish touse. Then hitcalculate.Calculate Vent Length.