| FRD Consortium | Unibox and other useful tools provided as Excel spreadsheets. Microsoft Excel required. |
| Jeff Bagby's Passive Crossover Designer | Excel spreadsheet that is probably the best crossover software freely available. Microsoft Excel required, of course. |
| CALSOD | Long-time design and optimization software from Audiosoft. DOS based, but it runs in an XP window. Still hard to beat for crossover design. |
| Liberty Audiosuite (LAUD) | Measurement software from Liberty Instruments used throughout this design. No longer available. Praxis is the new package. The free version was used to manipulate and present much of what appears on these pages. |
| SoundEasy | Measurement and Design Software. Includes a Digital Filter/Emulator that was used to audition all designs during development. Possibly the most cost effective commercial loudspeaker software package available at this time. |
| D. B. Keele's Web Site | Downloadable papers covering many aspects of loudspeakers and sound reproduction. |
| Zaph Audio | John Krutke's main page for driver measurement and distortion. Has measurements of the SB Acoustics drivers. |
| John Kreskovsky's Pages | Many articles covering various aspects of loudspeaker theory, measurement and design. |
| Mark K's Pages | Another excellent site on driver measurement and distortion. Also has measurements of the SB Acoustics drivers. |
| Dave's Speaker Pages | My web site covering a few aspects of loudspeaker design. Includes a section that has raw measurements of various drivers for download. |