For More Information
- Borbely & Gaertner, "Modular Active Crossovers",
Speaker Builder issue 1, 1994, p20.
- Describes how to build a complete active crossover. I used the
basic design described in this article, but substituted Burr Brown
OPA-2604 op-amps for the discrete-component buffer circuits used by
the authors. Back issues are available at AudioXpress.
- Horowitz & Hill, The Art of Electronics
- If you want to learn about the design, layout, or construction
of electronic circuits, this is the book to read. I read the first
four chapters, as well as the sections on active filters,
construction, and grounding schemes, before designing and building
- Vance Dickason, The Loudspeaker Design Cookbook
- Not just a collection of tables and stock loudspeaker designs
(although it does have lots of useful tables), this book has a lot
of information about how loudspeakers work, how loudspeakers fail
(or at least fail to operate according to the models), where the
tables come from, benefits and problems of all the different
configurations, and subtleties of construction that are not
covered in the tables. I pretty much read the whole damn thing
before building my speakers.
- M.E. Van Valkenburg, Analog Filter Design
- This is where I learned exactly what is meant by Chebyshev,
Bessel, Sub-Chebyshev, etc. This was very useful in designing the
auxiliary woofer filter, but is probably not necessary if you're
just doing a standard active crossover.
- Articles on loudspeaker models by A.N. Thiele and Richard
Small, published in Journal of the Audio Engineering
Society in the early 1970s.
- Dickason covers most of this in a more readable way in his
book, but if you want to get into the nitty-gritty of the
mathematical model, you'll have to read these. Like the active
filtering textbook, I needed to know this stuff to do the auxiliary
woofer filter but most people probably don't care.
- Audio Electronics Links
- Other web pages relating to amateur audio.
John Stimson /
Art Rock Cafe, New Armageddon /