VAR1 Relay

VAR1 Voice-Activated Relay for Paging System by Bogen

Model #VAR1

Regular Price: $252.41

Special Price $132.51

Product Overview

  • Two sets of C-Form (both N.O. and N.C.) relay contacts respond to audio activity

  • 4 levels of input signals: microphone, 600-ohm line, 25V, and 70V speaker systems

  • Adjustable release delay – 0.25s to 25s 

  • Separate microphone pre-amp gain control

  • Relay active indicator light

  • Built-in balanced, low noise, high gain microphone pre-amp

  • A transformer-isolated, 600-ohm small signal level output of the detected audio available

  • Trigger threshold adjustment 


The VAR1 Voice-Activated Relay for Paging System by Bogen is designed to detect voltages signals directly from a microphone or as high as 70V speaker systems, with multiple applications such as muting a sound system in response to a page announcement, activation of accesories or activation of a paging zone

A low-level output of the detected audio, transformer-isolated from the input, is also made available for use with other equipment. The VAR1 can also be used as a balanced, low-impedance microphone pre-amp.

The VAR1 is ideally suited to provide a set of contact closures for paging ports of lower cost telephone systems that do not have a set of AUX contacts to trigger paging equipment. An adjustable release delay (up to 25 seconds) keeps the paging system from dropping out in the middle of a page.



  • VOX Sensitivity: 20 mV to 150 mVrms @ 600 ohms Line input
  • Time Delay Range (approx.): 0.25 to 25 sec.
  • Relay Contact Rating: 2A/30V DC, 0.5A/120V AC
  • Power Requirements: External 12V to 24V DC @ 100mA (sold separately)
  • Dimensions: 5-3/8" W × 3-7/8" H × 1-3/8" D
  • Product Weight: 1 lb.


  • Impedance: 600 ohms
  • Frequency Response: 100 Hz to 10 kHz
  • 70V Input Impedance: 200k ohms
  • Output Level: 400 mVrms
  • 25V Input Impedance: 75k ohms
  • Output Level: 420 mVrms


  • Gain: 62 dB
  • Sensitivity: 750 microvolts, rms for 1Vrms out
  • Distortion: < 2%
  • Frequency Response: 200 Hz to 10 kHz
  • Output Signal-to-Noise Ratio: 55 dB

Additional Information

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