Here is an audio design software package that I developed called WattsFactor 1.0. It was targeted primarily for car audio use but can also be used for home audio. It will calculate sealed, vented, 4th order bandpass, 6th order bandpass. It operates in two different modes one that hides most of the advance options and is targeted for novice designers. The other mode has more advance features. It has five sealed alignments, three vented, box wizards, vent length calculator and man other features. Please email me for download information. The cost is $20.00. Here are some screen shots.
http://www.audiocircle.com/index.php?action=gallery
