|Pickup Distance||1-20 meters (adjustable)|
|Frequency Response||20Hz to 20KHz|
|Signal-to-Noise Ratio||90dB (@1KHz)|
|Dynamic Range||100dB (@1KHz)|
|Maximum Sound Pressure Level||120dB (@1KHz)|
|Signal Output Amplitude||1Vrms (@1KHz) / 2.8Vpp (@1KHz)|
|Output Impedance||600-1000 ohms unbalanced|
|Protection Circuits||Power polarity reverse protection, ESD protection|
|Connection Options||Supports standard RJ45, three-wire, and four-wire audio isolation output|
|Signal Transmission Distance||3000 meters (Use shielded cables in complex electromagnetic environments)|
|Network Communication Rate||10M/100M Adaptive|
|Power Voltage||POE IEEE 802.3at/af / DC 10V-30V / AC 10V-30V|
|Operating Temperature||-20°C to 60°C|
|Casing Material||Aluminum alloy|
|Installation Method||Bracket installation|
|Compliance Standards||Inspected by the Ministry of Public Security's Safety and Police-use Electronic Products Quality Testing Center|
Please check if the communication protocol of other SPON® IP audio devices has been set to NAS protocol, since the built-in web server can only identify other devices via NAS protocol.
The audio formats of IP Public Address are: MP2, MP3, AAC, etc. (MP2 and AAC are the standard designated audio formats of national DAB )
Compare of used Bandwidth: MP2: 256K-512K MP3: 64K-128K
Background Music and Announcements: The system can play music, Emergency Broadcasting.
Situation Reports: It can announce daily activity schedules, provide key points about significant events, and give updates about essential convoys passing through.
Emergency Interjections: The system can be used to urgently intercept vehicles violating rules, grant access to special vehicles, and command on-site order during chaotic situations.
Emergency Paging: If a toll booth encounters an unexpected situation, operators can use a one-touch emergency call to the control center or neighboring toll stations for immediate assistance.
Schools, especially those equipped with campus networks.
Highway Toll Stations
Office Buildings and Skyscrapers.
Rural Connectivity Projects.
Any location with network connectivity can benefit from the IP public address system.
High Audio Quality: The system offers pristine fidelity through its full digitalization, utilizing CD-like quality data file formats, which are perfectly consistent with computer output.
Personalization: Built on an Internet protocol, each audio endpoint can freely choose any channel for playback, with adjustable progress, allowing for point-to-point personalized programming.
Network Integration: From teachers' courseware production and arrangement to speeches and scheduled program broadcasts, everything can be operated remotely over the network.
Remote Functionality: The system supports remote broadcasting across different cities and even countries. As long as there's an internet connection, broadcasting can be initiated.