8-Channel Speaker Line Detector with Amplifier Changeover NVS-EN85LS

The NVS-EN85LS is a 19-inch 1U rack-mountable 8-channel amplifier controller that integrates fault auto-changeover and speaker line impedance surveillance into a single unit, providing a streamlined solution for professional audio systems. It ensures continuous operation by automatically switching to backup amplifiers in case of primary amplifier failure, while its advanced impedance monitoring system detects and reports speaker line faults, ensuring system integrity and compliance with safety standards. This compact unit is ideal for critical audio installations requiring high reliability and comprehensive monitoring

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The NVS-EN85LS is a 19-inch 1U rack-mountable 8-channel amplifier controller that integrates fault auto-changeover and speaker line impedance surveillance into a single unit, providing a streamlined solution for professional audio systems. It ensures continuous operation by automatically switching to backup amplifiers in case of primary amplifier failure, while its advanced impedance monitoring system detects and reports speaker line faults, ensuring system integrity and compliance with safety standards. This compact unit is ideal for critical audio installations requiring high reliability and comprehensive monitoring

FEATURES

  • Supports 1 standby amplifier to back up 1–8 main amplifiers within 1 second
  • Provides 8 speaker line supervision for open circuit, short circuit, and impedance fluctuation detection.
  • Each speaker zone is detected within 2 seconds
  • Amplifier and speaker line faults are alerted through indicators, a buzzer, fault output, and RS485 communication
  • Includes 8 amplifier indicators, 1 standby amplifier indicator, and 8 speaker line indicators
  • Features a calibrate button on the front panel to initialize or calibrate each amplifier and speaker line setting
SPECIFICATIONS

Model

NVS-EN85LS

Pilot Tone Frequency

20 KHz (±5%)
Detection Line 50V/70V/100V Speaker line
Input Sensitivity/Impedance 1V, 10K Ohm
Detection Level 50V rms min
Amplifier Detection Time < 1 Second
Speaker Line Detection Time < 2 Seconds per speaker zone
Changeover Time< 1 Second
Failure Detection Time
5-15 Seconds
Failure Reset Time
20 Seconds Max
Zone Loading Capacity
500W /100V Line Max
Measurement Sensitivity
±10% of Speaker line impedance
Max Loading Current
8A
Connector
Phoenix connector & RJ45
Power Supply 24V DC by phoenix connector Max. 2A
Dimension484x420x44 mm
Weight3.2kg





Part NumberDescriptionStandard Quantity 
NVS-EN85LS8-Channel Speaker Line Detector with Amplifier Changeover
01


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