Supported enclosure designs:
Sealed
Vented
4th order bandpass
- vented front chamber, sealed rear chamber
6th order bandpass
- vented front chamber, vented rear chamber
Isobarik -
multiple driver designs
Other features:
Sortable Driver
database makes it easy to store and recall driver information
Port length
and diameter calculator
Optimum box
dimension calculator - box dimensions to avoid internal
reflections
Thiele/Small
parameter calculator - derive T/S parameters from
electrical measurements
Graph response
of small signal gain or SPL
Unit conversion
calculator
Download
the demo version
View screen
shots
Read online help
Register
If you want to keep this program please register.
You'll receive all the features listed above.
If you have any questions 
hits since 2/18/01
Here is the main screen. As shown, multiple frequency
response plots can be overlaid. Range of frequencies (x axis) and
db/division (y axis) are adjustable via the menu or toolbar. After
driver parameters are entered, box volume and tuning frequencies are entered
in the edit boxes at the top of the window. Response is displayed by
typing ENTER or clicking the Plot button. The icon at the top left
shows the box design currently selected.
Calculate dimensions for cylindrical ports. Multiple
ports can be used to decrease length.
This calculator guides you through a series of electrical
measurements to derive the Thiele/Small parameters for an unknown driver.
See online help for more details.
http://www.ggimages.com/spsim