Yuooes factory is a professional manufacturer of audio equipment, including power amplifier, peripheral equipment (including pressure limiter, effector, equalizer, exciter, etc.), loudspeaker (speaker, speaker), mixer, sound source (such as microphone, musical instrument, VCD, DVD) display equipment and so on. Among them, a speaker is a sound output device, speaker, subwoofer, etc. there are three kinds of speakers in a speaker, including high, low and medium speakers, three but not necessarily three.