We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Bogen BG-VAR1 voice-activated relay unit with front panel controls

Bogen Communications

Bogen Communications BG-VAR1 Voice Activated Relay

SKU CH-XXHV-PXTG6

A DPDT relay triggered by microphone or line-level audio signals, with adjustable sensitivity, delay and isolated 600-ohm output

  • DetailsVoice Activated Relay
  • Voice-activated relay switches automatically when audio is detected
  • Handles mic, 600-ohm line, 25 V and 70 V speaker inputs
  • Built-in low-noise pre-amp boosts weak microphone signals
  • Transformer-isolated 600-ohm output delivers clean audio to other gear
  • Adjustable trigger threshold and delay prevent false activations

Voice-Activated Relay for Audio Systems

The Bogen Communications BG-VAR1 is a DPDT relay that triggers when an audio signal is detected at its microphone pre-amp or line-level inputs. It suits installers who need automatic muting, accessory activation or zone paging control in commercial sound systems. The unit requires an external DC power source to operate.

Installation Uses Slide Switch

A slide switch selects between the pre-amp and line inputs for quick setup. Installers adjust trigger sensitivity and delay using front-panel controls to match the environment. The relay provides two sets of C-Form contacts for normally open or normally closed wiring. No software configuration is required.

Handles Four Input Levels With Isolated Output

The device accepts microphone, 600-ohm line, 25V and 70V speaker signals without additional hardware. A transformer-isolated 600-ohm output passes the detected audio for monitoring or recording. It is not suited for installations that require digital signal processing or network-based control.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $128.99
Pricier than about 80% of the 3,838 comparable items (median $41.99).

Specifications

Product
Brand nameBogen
Model nameBG-VAR1

Questions about this item

How can I verify the relay is responding to audio after installation?

The unit provides two sets of C-Form relay contacts that change state when the VOX circuit detects a signal above the trigger threshold you set.

What comes in the box and what must I supply separately?

The VAR1 relay module is included; a DC power source is required but not supplied with the unit.

Which input should I select for a 70V speaker line versus a 600-ohm line?

Use the slide switch to choose the line-level position for 70V, 25V or 600-ohm inputs, and the pre-amp position for a microphone signal.

More in AV Accessories & Components

Similar items