• HARMAN brand public broadcasting is used in shaanxi hua county education bureau

    HARMAN brand pub

    The address of hua county education bureau is loca......

  • HARMAN brand public broadcasting system is applied to the new town agriculture park

    HARMAN brand pub

    Many new town as the west salty new city one of th......

  • HARMAN wireless FM radio successfully applied to mountain customs

    HARMAN wireless

    Shanhaiguan, also referred to as the shanhaiguan a......

  • HARMAN brand IP network broadcast successfully applied to shanxi datong yichina

    HARMAN brand IP

    Founded in 1951, ling qiu is the only public high ......

  • HARMAN brand smart broadcast successfully applied to guizhou tianzhu hotel

    HARMAN brand sma

    Sky column in kaili hotel is located in qiandongna......

  • HARMAN brand IP network broadcast successfully applied to zhejiang pingyang wealth city plaza

    HARMAN brand IP

    Is located in the town, pingyang county, zhejiang ......

  • HARMAN campus radio is escorting the college entrance examination of zhoukou high school in henan province

    HARMAN campus ra

    Zhoukou city, henan province, located on the south......

  • The HARMAN brand public broadcasting system was successfully applied to shanxi jincheng hospital

    The HARMAN brand

    Jincheng located in jincheng city, Shanxi Province......

  • The HARMAN campus broadcasting system was successfully used in shandong new era school

    The HARMAN campu

    New school is located in shandong weifang binhai e......

  • HARMAN (HARMAN) brand wireless vehicle-mounted audio and video system has been successfully applied to China's hui-cong home electric city


    China huicong electric city is located in beijiao ......

  • Our company's j-bebo (poly) brand audio support shenyang middle school sports center

    Our company'

    The second middle School in Shenyang, Shenyang No.......

  • The HARMAN audio broadcast successfully applied to the nanchang sports center of jiangxi province

    The HARMAN audio

    It is reported that the construction project of na......

  • HARMAN brand conference sound system successfully applied in shenzhen yantian customs building

    HARMAN brand con

    Shenzhen customs office of the People's Republ......

  • Haman acoustics and yacht will jointly build a medium private luxury yacht sound system

    Haman acoustics

    Yacht (yacht) is a kind of recreational vehicle, m......

  • HARMAN's brand sound system and campus broadcasting system have been successfully applied to Beijing new town vocational college

    HARMAN's bra

    District of Beijing city vocational school is dire......

About us

Greatwall Group administrates GUANGZHOU PRECISE SOUND ELECTRONIC MANUFACTORY and GUANGZHOU ZHUNKUAI HARDWARE MANUFACTORY.It designs, manufactures and sells pro-audio products and hardware products. Our products include professional loudspeakers, line array, power amplifiers, mixers, signal processor, amplifier cases, mixer cases, etc.


Contact us

  • Guangzhou polyacoustic acoustics Trade Co., Ltd.
  • 4408-771-883
  • jusound@greatwallaudio.com
  • Guangzhou City, Panyu District District Shanxi road quasi