An Explanation of the Inner Workings of Modern Amplifiers

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The design of audio amplifiers has changed quite a bit over the last few decades. As a result, modern audio amplifiers are less expensive to manufacture and take up less space. These advances have come at a critical time because home theater systems have become quite popular. These systems employ a number of loudspeakers to reproduce surround sound. For that purpose, more than two amplifiers are required.

Modern AV receivers typically feature at least seven amplifiers which are built into one unit. Due to the small size of modern Class-D amplifiers, all of the amplifiers can be incorporated into a single unit without the receiver becoming huge. In addition, modern amplifiers feature high efficiency. That means that only a small fraction of the wattage that is consumed by the amplifier is wasted and therefore only very …