Preface to Fourth Edition

The Audio Power Amplifier Design Handbook has now reached its Fourth edition, and it is very good to see that it fulfils a real need. It has once again been expanded with a significant amount of new material. This time two whole new chapters have been added, one on the Design of DC Servos for controlling output offsets and another on Class-D Amplifiers, which have grown markedly in importance in recent times.

There have also been major new sections added on the detailed design of DC protection circuitry, and on the Safety regulations. No DC-coupled power amplifier can be regarded as complete until it has proper DC protection – having an amplifier fail is bad enough, but having it fail and take an expensive loudspeaker ...

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