5.1 CH Home Theater Speaker System is the common name for six channel surround sound audio systems. 5.1 Speaker is the most commonly used layout in home cinema. It uses five full bandwidth channels and one low-frequency effects channel (subwoofer) to bring Stereo realistic sound. 5.1 Home Theater is also the standard surround sound audio component of digital broadcast and music.
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Guangzhou J.SUN Electronics Co., Ltd. , http://www.jsunaudio.com