Sinbosen are focusing on switching power amplifier, Digital amplifier,
DSP amplifier, Microphone, and line array speaker. Through continuously
offering top quality products and service, Our 4 channel power amplifier
FP20000Q has gained lots of satisfactory feedback! Our dream is to be
a new level of sound system!
https://www.sinbosenaudio.com/sinbosen-fp20000q-p00092p1.html