Broadcast technology program

  • Unit broadcast system solution

    Unit broadcast system solution

    A unit is a high performance multifunctional office building, in order to ensure the various departments of communication and coordination work line of confiden...


  • Conference system audio interference solution

    Conference system audio interference solution

    Conference system signal flowBranch field equipment including conference terminals and related external equipment, equipment types and functions. Audio signal t...


  • Haman IP network fault solution

    Haman IP network fault solution

    (about Haman)Pay attention to the official Haman WeChat: WeChat public platform to enter HARMAN to add or scan the two-dimensional code below WeChat.Haman offic...


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
  • Guangzhou City, Panyu District District Shanxi road quasi