RDL STM-DA3 – Mic Level Distribution Amplifier, 1x3 is backordered and will ship as soon as it is back in stock.
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What is the RDL STM-DA3?
The RDL STM-DA3 is a microphone-level distribution amplifier that feeds one microphone to three microphone inputs. It provides electrical and audio isolation between outputs for broadcast, recording and commercial sound.
How does it work?

The 1.2 kohm balanced input accepts a wide range of mic levels without loading professional microphones. A multi-turn trimmer adjusts gain from -5 dB to +12 dB to match facility levels. Three balanced outputs are highly isolated, so a short on one output has no effect on the others. Phantom is supplied to the input when supply voltage is connected to the PHM terminal, and a Dual-LED VU meter simplifies setup. It runs from a 24 Vdc supply such as the RDL PS-24AX 24 Vdc power supply, and STICK-ON modules mount in the RDL STR-19B racking system or on a rear rack rail with the RDL ST-RRB1 rear rack rail kit.
What are the key features?
- One mic to three inputs — A single microphone feeds three mic-level destinations.
- Output isolation — Outputs are electrically and audio isolated, unlike splitting transformers.
- Adjustable gain — A 25-turn trimmer sets gain or loss to match facility mic levels.
- Phantom power — Standard 24 V phantom can be supplied to the microphone input.
- Dual-LED VU meter — The meter allows level setup without external test 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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