Sabine and Eyring Formulas
http://www.wsdg.com/resources/resour.php?SL=te&BL=4
designed to model 2-way loudspeaker systems. The resulting frequency and phase response curves predict the on-axis sound pressure level produced by the interaction of your choice of crossover, drivers and enclosure design.
http://www.wssh.net/~wattsup/audio/sdlmp215.zip
Using a Soundblaster you can provide a Spectrum Analyzer, Real time Analyzer, Oscilliscope & VU meters that can be used with line or mike inputs from your sound card.
http://www.wssh.net/~wattsup/audio/Pclab95.zip
This program is designed only for figuring true "optimum" ported enclosures. MD1 also displays the drivers EBP, and recommends an enclosure type to best fit the driver.
http://www.wssh.net/~wattsup/audio/mobiledesign.zip
A DOS based speaker enclosure design program.
http://www.wssh.net/~wattsup/audio/pet169.zip
Loudspeaker Box Design program written for DOS.
http://www.wssh.net/~wattsup/audio/spkbox20.zip
generates up to 3 discrete sophisticated speaker/enclosure models using widely availa- ble Thiele-Small parameters. Models are displayed with richly colored graphs.
http://www.wssh.net/~wattsup/audio/led220sw.zip
program for the simulation of loudspeaker performance.
http://www.wssh.net/~wattsup/audio/prfect45.zip