Speaker is the addition of language, music, sound, including the natural sound, animal sounds, machine tools, audio and human actions issued

The various sounds, etc. 　　Audio is probably include power amplifier, peripheral devices, including covering compressing, effects, equalizer, VCD, DVD, etc.), speakers (speaker

A mixer, horn), microphone, display devices, etc. add up to a set. Within this total, the speaker's voice output devices, speakers, subwoofer, and so on. A speaker in the package

Enclosed by high, low, medium three speakers, three but not necessarily three.

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