RDL ST-GCA3 – Line-Level Automatic Gain Control Amplifier is backordered and will ship as soon as it is back in stock.
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What is the RDL ST-GCA3?
The RDL ST-GCA3 is a line-level automatic gain control amplifier that keeps audio levels uniform by raising low signals and reducing high ones. It suits background music, paging, intercom and microphone mixing systems.
How does it work?

The ST-GCA3 accepts a balanced input from -45 dBu to +20 dBu and holds the output within 3 dB across an AGC range greater than 40 dB. The adjustment rate is switch-selectable: SLOW mode is ideal for leveling music sources, while FAST mode corrects loud bursts and inconsistent levels in paging and intercom systems. It provides a +4 dBu, 150 Ω balanced line output and a -45 dBu balanced mic-level output. Frequency response is 10 Hz to 20 kHz (±0.75 dB). Power it from a 24 Vdc supply such as the RDL PS-24AX.
What are the key features?
- Automatic gain control — Output is held within 3 dB over more than 40 dB of input range.
- Switch-selectable SLOW and FAST — Choose inaudible leveling for music or fast correction for speech.
- Line and mic outputs — Balanced +4 dBu line and -45 dBu mic-level outputs feed different inputs.
- Wide input range — Inputs from -45 dBu to +20 dBu produce rated output.
- SupplyFlex power input — It runs from ground-referenced, floating or bipolar 24 Vdc.
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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