WinISD is freeware speaker designing software for Windows environment. You can design Closed, Vented and Bandpass boxes with this program. It also allows you to calculate few different types of filters.
NOTE! WinISD is still in betaversion, so please be patient with errors that may occur. Most helpfull would be if you would report them to Juha Hartikainen.
Download latest version (0.7.950, 29.10.2016)
Old versions are also available:
WinISD 0.50 (year 2004)
WinISD 0.44 (year 2002)
If you like the software, please consider making a donation.