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About product and suppliers:
        Alibaba.com offers 1,313 28mm speaker products. About 47% of these are speaker, 13% are acoustic components, and 2% are professional audio, video & lighting. 

A wide variety of 28mm speaker options are available to you, such as computer, home theatre, and mobile phone. You can also choose from mini, wireless. As well as from 1, 2 (2.0), and 4. And whether 28mm speaker is passive, active, or home amplifier. 

There are 1,313 28mm speaker suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 28mm speaker respectively. 

8mm speaker products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 632 with ISO9001, 101 with Other, and 14 with ISO14001 certification.