The 5.1-channel surround audio system has been around for two decades now, and has become the absolute standard for home theaters. But if you go up to the luckier-sounding 7.1 surround system, the cinematic audio experience is delivered through seven speakers and a subwoofer. What this bigger set does to the audio ambience is substantial, and the improvements to the directionality and continuity of the sound are immediately noticeable. Note that these are complete systems, rather than mixed-and-matched speakers.
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