This production line covers 4 types of amplifiers: preamplifier, power amplifier and mixer amplifier, digital amplifier.
Preamplifier, it is an electronic amplifier that prepares a small electrical signal for further amplification or processing. It is the audio mixer for different types of audio inputs, which is very common in Public Addressing System.
Power Amplifier. The power amplifier has 2 types of speaker outputs: low impedance (resistance fixed) output at 4-16Ω) and high impedance (voltage fixed) output at 70V/100V.
Mixer Amplifier. Mixer amplifiers not only have the functions of preamplifiers and power amplifiers, but sometimes also have zone control function. They may have microphone inputs in 6.35mm/XLR/combo sockets, auxiliary line inputs in RCA/combo sockets, MP3 via SD card/USB/Bluetooth, Tuner of AM/FM, built-in Chime. Some also have EMC input and TEL input. They support local paging, and some support remote paging CAT-5 cable,
Digital Amplifier include multichannel digital power amplifier and digital mixer amplifier with audio source. Comparing to analog amplifier, digital amplifier is more efficient in power saving, efficiency up to 85% or more. And the amplifier module is more compact and saves a lot space.

Wifi Amplifier (3)

Digital Power Amplifier (12)

Mini Mixer Amplifier (1)

Multi Zones Mixer Amplifier (10)