Collo's DIY Subwoofer Tools

This site aims to pass on what I've learnt from building a series subwoofers over recent years.

On this journey, I've had a thirst to understand some of the deeper aspects of design that are not addressed by the run of the mill design software out there.

Through a series of experiments, some of these secrets have been quantified and incorporated into the free software that's available on this site.

There's a program for optimising enclosure dimensions for resonances, whilst taking port and driver volumes into account

There's also software for designing flared ports, along with plenty of info on the subject

An extensive section on understanding QRD diffusers includes software to design and produce them

A bit of time is also devoted to speaker building tips, helping your project to go more smoothly.

I hope you enjoy your visit to my site. Bill "Collo" Collison, Aussie sub builder and code wrangler


Free Software

Design your enclosure to minimise problem resonances, whether it's a regular box or a cylindrical sonosub
Discover your optimum port diameters and flare sizes to avoid compression and chuffing
Build a high-pass filter to save your driver from over-excursion
Design and build a QRD diffuser to tame your room

Screenshot of Free software to compliment the WinISD design package
Cropped screenshot fragments of software available on this site



All you will ever need to know about ports and port flares - understand how to design them, and how to make your own
If you are keen, you can read about the flare testing experiments. Really, this will take you down the rabbit hole bigtime!

Photo of bandpass subwoofer internals
Photo of two six-inch DIY flared ports used in a bandpass sub



All the subwoofers I've built so far, ranging from a simple box, to a 12 driver Infinite Baffle monster.

Photo of dual-driver subwoofer enclosure



Help with actually building your sub including an illustrated step by step walk through.

Photo of speaker box internals



Get your sub to work nicely with your room and existing Home Theater equipment. Apply room treatments.

Diagram of connecting AV components



/index.htm last modified: 12 August 2019
Privacy         Contact