RDL ST-VOX1 – STICK-ON Voice Operated Relay is backordered and will ship as soon as it is back in stock.
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What is the RDL ST-VOX1?
The RDL ST-VOX1 is a STICK-ON audio controlled relay that switches equipment when a voice signal is present. It suits intercom, talkback and radio push-to-talk applications.
How does it work?

The relay can be triggered from mic or line level signals, and in intercom or talkback systems it may be triggered directly from an unbalanced microphone. Where the microphone must be preamplified, RDL pairs it with the RDL STM-1 preamp, using the STM-1 unbalanced output to trigger the ST-VOX1 and its balanced output for the audio feed. A precise threshold adjustment sets the trigger level, and DPDT contacts handle the switching. An open-collector SLAVE output can control additional equipment.
What are the key features?
- Voice-controlled switching — The relay operates when a voice signal is detected on its input.
- Mic or line level triggering — Switching can be driven from microphone or line level signals.
- Precise threshold adjustment — The trigger threshold can be set precisely for the expected signal.
- DPDT switching contacts — Double-pole double-throw contacts switch external equipment.
- Open-collector SLAVE output — A SLAVE output can control other modules or equipment.
At Creation Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
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