Receivers: 5 Fast Facts

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Fact #1. It was primarily US soldiers returning from the battles of World War 2 who began the audio revolution. A number of fighting men learned electronics and radio operations in the war. Many others took advantage of the GI bill to get themselves a legitimate education in the field. A lot of the audio innovations through the 1940s, 1950s, and 1960s came at the hands of these vets.
Fact #2. By the mid 1960s, musical revolutions were occurring everywhere. From the birth of rock and roll to the protest movement against the Vietnam War. With those revolutions came a desire for better audio experiences. Here you see the advent of the stereo store. Previously, radio stores sold parts for their tinkering hobbyist customers. Now you had customers coming in and demanding systems outfitted with certain technologies.
Fact #3. The centerpiece of these stereo systems was the audio receiver. These were analogue amplification devices that usually fed only two speakers or a set of headphones. The sound quality was greatly determined by the quality of the wiring. All the way up to the arrival of digital audio on the consumer stage in the 1980s. Once it was on its way, the advancements no longer required a war to continue.
Fact #4. Receivers are important components of surround sound systems. Your receiver takes an incoming signal and amplifies it. Then it redirects it out through the system. That redirection can split the incoming audio signals into a few different sound maps. That way, the audio can come out with a realistic feel.
Fact #5. There are two different styles of surround sound. Most people are familiar with Dolby Digital. This is incorporated in most computers and stock receivers. It is actually slight less high fidelity than the competing style. Digital Theater Systems compresses audio at a much higher bit rate. That means the audio has more room to breathe, allowing for more nuance.