Free Software

When designing the working volume and tuning frequency for your subwoofer, it's hard to go past WinISD, linked to at the bottom of the list.
The rest of the software here does the stuff that WinISD doesn't cover, such as helping you work out your enclosure dimensions, choose the correct size for your ports, and design a high-pass filter.
Most recently added is QRDude, a package for designing QRD diffusers, along with a comprehensive Technical Reference, detailed User Guide and Sample Build page.

 

• Boxnotes Determine your enclosure dimensions taking into account the space occupied by ports and the driver. Adjust the height / width / depth ratios to minimise problem resonances within the box. Print your cutting list
• Sonosub If you prefer to use sonotube to build a cylindrical sub, this software will help
• Flare-it Choose port diameter and flare size to minimise turbulence
• Active High Pass Filter Good insurance for your bass drivers
• Subsaver Calculator for finding component values for the Active High Pass Filter
• QRDude Design advanced QRD diffusers
• QRD Technical Reference A detailed explanation of the theory behind QRD diffusors. Follows on to the QRDude User Guide and Sample Build
• WinISD A look at some of the features of this free speaker design software from Finland

 

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