Features:

◆  4 CH independent network signal inputs, 4 CH independent audio signal outputs, 4 short activation signal 

      outputs, and 4 CH 24V forced insertion signal outputs (needs to be customized) 

◆ 4 CH independent treble and bass adjustments

 ◆ 1 microphone signal and one unbalanced line input,  switching between 1-in and 4-out matrix, and can 

    perform local audio amplification or paging for a single or full area of 4 output zones in both connected 

    and offline states

◆ 4 short circuit activation inputs, and can be connected to the network to control the sound output of any 

    terminal device when network communication is normal. 

◆ Short circuit activation is configured through the server, implementing network alarm, network playback 

   of sound source, local offline alarm, or local playback of audio file

◆ It can be accessed to  Ethernet port, supporting cross network segments and cross routing.

Specifications:

◆ Microphone input: MIC: 600 Ω 5mV, unbalanced

◆ Line input: AUX1: 10K Ω ≥ 200mV, unbalanced

◆ Line output: ＞ 0.775V (0dB), unbalanced

◆ Frequency response: 60Hz-15KHz (± 3dB) 

◆ Power supply, power consumption: AC220V, ≤ 10W

◆ Network communication protocols: TCP, UDP, ARP, ICMP, IGMP

Network chip speed: 10/100Mbps

◆ Audio encoding: MP2/MP3/PCM/ADPCM

◆ Audio sampling: 8kHz~44.1kHz, 16 bits

◆ Transmission bit rate: 8kbps-320kbps

◆ Signal to noise ratio: ≥ 90dB

◆ Network sound delay: Broadcast delay ≤ 100ms

◆ Power supply: AC 220V ± 10% 50-60HZ

◆ Size: 89 x 483 x 366 mm