1. Sound source equipment (DVD, CD, MP3, MP4, computer, mobile phone, microphone and other sound source output equipment);

2, audio signal dynamic processing equipment (pressure limiter, effect device, mixer, audio processor, equalizer and other audio signal processing equipment);

3, audio signal amplification equipment (pre-stage power amplifier, post-stage power amplifier, digital power amplifier and other analog power amplifier, equipment);

4, sound reduction equipment (full frequency speakers, ceiling speakers, sound posts, linear array speakers, array speakers, tweeters, subwoofers, etc.),

Specific include power put, peripheral equipment (include pressure limit device, effect device, equalizer, incentive device), loudspeaker (sound box, horn), mixing station, sound source (be like microphone, musical instrument, VCD, DVD) show equipment and so on add up a set. Among them, sound box is voice output equipment, horn, subwoofer to wait a moment, a sound box includes tall, low, in 3 kinds of loudspeaker, 3 kinds but not necessarily 3.