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About product and suppliers:
        Alibaba.com offers 257 21 bass speaker products. About 54% of these are speaker, 25% are professional audio, video & lighting, and 2% are subwoofers. 

A wide variety of 21 bass speaker options are available to you, such as home theatre, karaoke player, and computer. You can also choose from mini, portable, and wireless. As well as from passive, active. And whether 21 bass speaker is 3 (2.1), 2 (2.0), or 1. 

There are 257 21 bass speaker suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 21 bass speaker respectively. 

1 bass speaker products are most popular in North America, Southern Europe, and South Asia. 

You can ensure product safety by selecting from certified suppliers, including 29 with BSCI, 22 with ISO9001, and 10 with Other certification.