Subwoofer Design

When it comes to speaker design, it's handy to have an up to date list of local suppliers and some quality software. The software is all free and helps 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 technical reference and detailed help. The drivers, amps and pipe supplies listed here are specific to Australia, and are reasonably up to date.

• QRDude Design advanced QRD diffusers
• QRD Technical Reference A detailed explanation of the theory behind QRD diffusors. Follows on to the QRDude User Guide
• Boxnotes Optimise your enclosure dimensions and 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

• Drivers Comparison of some subwoofer drivers available in Australia
• Amplifiers Details of some amplifiers available in Australia for your powered subwoofer
• PVC Pipe sizes Some of the sizes available in Australia suitable for making ports
• WinISD A look at some of the features of this free speaker design software from Finland