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Welcome to my website for audio enthusiasts and professionals alike. My name is Bob Cordell and I
hope you will enjoy the contents here. I am both an engineer and a DIY hobbyist, and I love to mix the two.
Designing Audio Circuits and Systems
Designing Audio Circuits and Systems was published by Routledge/Focal Press in June 2024 (ISBN 978-1-032-01089-2).
The 700-page book comprises 30 chapters and covers just about everything in audio circuit and system design with the exception
of audio power amplifiers, which are covered in the second edition of Designing Audio Power Amplifiers. The broad subject of
audio design is covered in a way that is intended to be readable and valuable to professionals, enthusiasts and educators alike.
In order to cover audio design with depth and breadth, many foundational electrical engineering subjects are covered as well,
making the book especially effective in electrical engineering education. These include circuit design, semiconductors, low-noise
design, negative feedback, network theory, active filters, switch-mode power supplies, passive components and others. Coverage of
these topics makes the book a valuable electrical engineering resource that goes well beyond the subject of professional and
consumer audio. Take a quick tour of the book by clicking below to see the preface, chapter listing and table of contents. Whether
you are new to audio design or a seasoned professional with years of experience, I think you will enjoy the read.
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Designing Audio Power Amplifiers
The second edition of Designing Audio Power Amplifiers, was published in 2019 by Routledge/Focal Press (ISBN 978-1-138-55544-0).
The 776-page second edition comprises 36 chapters, including 5 new chapters compared to the first edition. Many of the chapters of the
first edition have been substantially updated and expanded. The art and science of audio power amplifier design is covered in a way
that is intended to be readable and valuable to professionals, enthusiasts and educators alike. The book covers audio power amplifier
design with depth and breadth. Many foundational electrical engineering subjects are covered as well, including circuit design,
semiconductors, low-noise design, feedback compensation, SPICE simulation, switch-mode power supplies and others. Coverage of these
subjects makes the book a valuable resource for electrical engineering that goes well beyond the subject of audio power amplifiers.
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about Designing Audio Power Amplifiers ...
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QuantAsylum QA403 Audio Analyzer Tutorial
The QuantAsylum QA403 is an affordable audio analyzer that provides very high performance in carrying out virtually all common
audio measurements, including those of a THD analyzer (www.quantasylum.com). It employs digital signal processing with high-performance
DAC and ADC interfaces to the analog world. This tutorial is a step-by-step run-through for measuring a real-world power amplifier.
The amplifier being tested is the 140 wpc BC-1 power amplifier described elsewhere on this site.
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What's on this Site
Here you'll find design information and examples for audio electronics, loudspeakers, test instruments (including a DIY THD analyzer)
and SPICE simulation. Over the years I've published a number of journal papers and magazine articles on audio. PDF's of those are also
available here.
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