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HD Ceiling Speaker

HD Ceiling Speaker

Superior sound, crystal clarity
 Wide Frequency
 HD Audio Qualtiy
 High-Frequency Speaker
 ABS + Metal Rear Bucket
Product Specifications
Model No. NAC-181 NAC-182
Max Power 30W 45W
Rated Power 20W 30W
Power Options(100V) 2.5W/5W/10W/20W 3.75W/7.5W/15W/30W
Power Options(70V) 1.25W/2.5W/5W/10W/20W 1.8W/3.75W/7.5W/15W/30W
Constant Resistance (8Ω) 20W 30W
Sensitivity(1m/1W) 88dB 88dB
SPL(1m/20W) 101dB 103dB
Frequency Response 200Hz-18kHz 130Hz-17kHz
Dispersion Angle(1kHz/-6dB) 150° 150°
Rated Input Voltage 100V/70V 100V/70V
Rated Impedance(100V) 4kΩ/2kΩ/1kΩ/500Ω 2.7kΩ/1.3kΩ/667kΩ/333/kΩ
Rated Impedance(70V) 4kΩ/2kΩ/1kΩ/500Ω/250Ω 2.7kΩ/1.3kΩ/667kΩ/333/kΩ/167kΩ
Connection European terminal European terminal
Dimension Φ140mm x 165mm Φ267mm x 162mm
Hole for Mounting Φ180mm Φ240mm
Material/ Back barrel ABS/Iron ABS/Iron
Grille Powder Coated Iron Mesh Powder Coated Iron Mesh
Product Weight 2.2Kg 3.34Kg
Speaker Size 4" Woofer + 3/4"Tweeter  6.5" Woofer + 1" Tweeter 
Operating Temperature -25℃ to 55℃ -25℃ to 55℃
Storage Temperature -40℃ to 70℃ -40℃ to 70℃
Relative Humidity ≤95% ≤95%
Is there a function to reduce Noise Elimination?
 The IP paging mic is built with the Noise reduction algorithm.
Can it work in cases where the server has network problems?
The IP paging mic supports offline calling without server software.
Support recording all incoming and outgoing call information. Including calls that have missed calls?
Yes, it supports
What should I do if other SPON® IP audio devices cannot be identified by the built-in web server of SPON® IP paging console?
  • 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.

Which Audio Formats are supported by SPON IP public address system? How much bandwidth is used?
  • 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

Practical features of the IP PA system when applied to highways?
  • 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.

Where can digital IP public address systems be applied?
  • Schools, especially those equipped with campus networks.

  • Highway Toll Stations

  • Chain Supermarkets

  • Large Enterprise.

  • Office Buildings and Skyscrapers.

  • Rural Connectivity Projects.

  • Any location with network connectivity can benefit from the IP public address system.

How does SPON's IP public address system set itself apart from traditional PA systems?
  • 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.