Audio amplifiers are essential in audio systems, designed to increase weak audio signals to drive speakers and produce sound. While each type of amplifier boosts audio, the way they handle signals, manage heat, and affect audio quality varies significantly, leading to different classes of amplifiers with unique advantages and trade-offs. The main amplifier types—Class A, B, AB, and D—offer differences in sound fidelity, efficiency, and practicality which may affect which design is best according to various audio applications.
But the general performance needs are still the same across amplifier types. How well does the device filter for noise? What's the frequency response? Is the gain linear? Evaluating these performance metrics requires rigorous testing, and that's where the very nuanced measurement tactics and tools for amplifiers come into play.
Application Note: Testing Power Amplifiers
Power amplifiers present a unique set of testing challenges that are usually not encountered when working with digital or low-level analog circuits, due to the fact that they must supply significant current as well as voltage to their loads. Factors such as power supply current and voltage limitations, thermal characteristics of the output devices and associated heatsinks, and the resistive and reactive components of the load must be considered during testing to produce meaningful results.This paper covers the fundamental measurements for testing power amplifiers, with specifics on how to best accomplish the tests using APx hardware and software.
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In this session, Audio Precision General Manager and industry expert Daniel Knighten provides insights into the fundamental measurements needed for designing and manufacturing audio power amplifiers. Whether you're new to testing audio power amplifiers or want to deepen your understanding of the fundamental measurements used to test these devices in APx analyzers, this webinar will equip you with valuable information.
