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About product and suppliers:
        Alibaba.com offers 3,493 sound 7.1 products. About 34% of these are earphone & headphone, 9% are speaker, and 7% are home theatre system. 

A wide variety of sound 7.1 options are available to you, such as mobile phone, computer, and portable media player. You can also choose from bluetooth, microphone, and noise cancelling. As well as from headband, in-ear. And whether sound 7.1 is 3.5mm, or usb. 

There are 3,523 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 315 with Other, 276 with ISO9001, and 240 with BSCI certification.