2U standard 19-inch rack structure, balck alumina brushed panel, user-friendly handle, advanced titanium gold polishing process, full of high-end temperament;
Built-in 150W constant resistance (4-16Ω), constant voltage (70V, 100V) power amplifier output, strong power, free selection;
2 lines (AUX) and 1 microphone (MIC) input, realizing local external audio input and emergency broadcast input, with independent volume adjustment;
1 channel audio signal auxiliary output, convenient to expand external power amplifier; 1 channel USB audio source input;
★ Local MIC signal has priority to auxiliary input AUX and network background music signal; auxiliary input AUX and network background music signal are of the same level, no priority; network emergency alarm signal has priority to local MIC, auxiliary input AUX and network background music signal;
The operation is simple, no manual setting is required, and the connection to the server is automatically completed after networking;
Support to get tracks from the server and from the U disk;
Automatically complete the synchronization of the timing program with the server, the server program changes, and the network is automatically synchronized;
Compatible with standard SIP (RFC3261) protocol, can access mainstream IP PBX/IMS platform
Support VOIP phone access.
★ Two working modes, online and offline, can still perform timing tasks in the event of a network failure;
★ Support remote upgrade of the firmware version of this machine.
Support remote fixed-point broadcasting, remote sub-multicast broadcasting and whole area broadcasting;
The equipment is designed with embedded linux technology and DSP audio processing technology; adopts high-speed industrial-grade chips;
It has the function of collecting and broadcasting, one external audio source input or MIC input, and the collected audio files are sent to the designated terminal for playback;
Standby power is less than 3W, meeting the national environmental protection and energy saving certification standards;
Support cross-virtual local area network or three-layer routing.
★With remote Internet playback function.
With the function of restoring factory settings
All-in-one rack-mounted design, integrating network audio decoding, digital power amplifier and audio source input
★Linked with IP camera video, real-time monitoring of on-site conditions during broadcasting
Online remote adjustment of output volume through software
Support IP address broadcast
File playback: the delay is less than 50ms;
Real-time speech: Delay is less than 150ms;
The network delay is less than 50MS;
Short circuit, overheating, and overload automatic detection and protection functions;
Interface rate: 10M/100M/1000M adaptive;
Support all audio formats supported by WINDOWS;
★ The products have passed ISO9001, ISO14001 and OHSAS18001 system certification
★ The product has passed 3C certification;
★ IP network broadcasting has obtained a number of invention patents.
★ The manufacturer is a national high-tech enterprise.

Network characteristics:
Support SIP 2.0, TCP/IP, UDP, DHCP
Support primary DNS and secondary DNS server
Support VLAN
Support SNTP client
Support VPN L2TP / PPTP
Support SRTP
Support webpage HTTP/HTTPS
Support Qos: 802.1p/q, DSCP
Support MD5 authentication
DHCP / static / PPPoE
STUN
Configuration and management:
Auto-Provisioning via FTP/TFTP/HTTP/HTTPS/DHCP OPT66/SIP PNP/TR069
Web management interface
Web-based Packet-dump
Configuration export/import
software upgrade
System Log (Syslog)
Audio characteristics:
Narrowband speech coding: G.711a/u, G.723.1, G.726-32K, G.729AB
Wideband speech coding: G.722
Voice activation detection/silence suppression
DTMF: In-band, Out-of-band (RFC2833) / SIPINFO

Physical specifications
Rear panel interface:
1 RJ45
1 USB
1 3.5mm audio input interface
4 AUXl inputs
2 LINE OUT
1 way DC24V test power supply
2 LED signal indicators
1 way COM audio binding post
1 way 4-16 ohm audio binding post
1 way 70V audio terminal
1 way 100V audio terminal
Power supply: AC2200V
Rear panel buttons: volume +, volume -, reset
Front panel interface:
switch
IP volume control knob
AUX volume control knob
MIC volume control knob
MIC input interface
Front panel indicators: power indicator, sound indicator
Sampling rate: 8K-96K
Bit rate: 8K-512Kbps
EMC input sensitivity: 775mV
AUX input sensitivity: 550mV
MIC input sensitivity: 10mV
Tweeter boost and attenuation: ±10.5dB
Bass boost and attenuation: ±10.5dB
Standby power consumption: <13W
Frequency response: 60Hz~18KHz +1/-3dB
Total harmonic distortion: ≤0.1%
Sex to noise ratio S/N: ≥85dB
Environmental humidity: 0℃~60℃
Environmental humidity: 10%~90%
Size: 484*450*88mm
Weight: 15Kg