Key Features: This Bogen voice-activated relay monitors audio activity across a wide input voltage range. It has two sets of C-form relay contacts (both N.O and N.C) that respond to audio. It supports four signal levels: microphone, 600-ohm line, 25V, and 70V speaker systems. There's a built-in balanced, low-noise, high-gain microphone pre-amplifier. A transformer-isolated, 600-ohm small signal level output of detected audio is available. It works well with self-amplified or central-amplified paging systems. There's a separate microphone pre-amp gain control. The release delay is adjustable from 0.25s to 25s, and you can also adjust the trigger threshold. There's a relay active indicator light. The PRS40C 12V DC Power Supply is available as an accessory (sold separately).


Using the Bogen Voice-Activated Relay is easy. First, connect it to your audio system according to the signal level you need, like microphone, 600 - ohm line, 25V, or 70V speaker systems. You can adjust the gain of the microphone pre - amp with the separate control. Set the release delay from 0.25s to 25s and the trigger threshold as per your requirements. The relay active indicator light will show you when it's working. When using the relay, make sure to use the correct input voltage to avoid damage. If you're using the PRS40C 12V DC Power Supply, note that it's sold separately. For maintenance, keep the relay in a dry and clean place. Regularly check the connections to ensure they're secure. If you notice any unusual performance, check the settings and connections first before seeking further help.