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About product and suppliers:
        Alibaba.com offers 3,421 sound 7.1 products. About 42% of these are earphone & headphone, 1% are set top box. 

A wide variety of sound 7.1 options are available to you, such as portable media player, computer. You can also choose from bluetooth, microphone. As well as from neckband, headband. And whether sound 7.1 is free samples, or paid samples. 

There are 3,424 sound 7.1 suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Hong Kong, and Italy, which supply 98%, 1%, and 1% of sound 7.1 respectively. 

Sound 7.1 products are most popular in North America, Southeast Asia, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 240 with BSCI, 200 with ISO9001, and 152 with Other certification.