RDL ST-GCA3 Gain Control Amplifier, Line Level

Keep audio levels steady across your paging, broadcast and security systems with the Radio Design Labs ST-GCA3 gain control amplifier. This pro-level signal amplifier automatically raises low inputs and reduces high peaks to maintain a nominal +4 dBu line output, delivering consistent, intelligible audio for monitoring, surveillance and public address applications. Use the switch-selectable SLOW setting for music and background audio to avoid compression artifacts, or FAST for voice and burst-prone sources to rapidly correct level spikes. The ST-GCA3’s peak-detection circuit accelerates AGC response to transients while preserving clarity across a wide 10 Hz–20 kHz bandwidth; a mic output sits 50 dB below line for convenient downstream feeding. Installers benefit from easy setup with intuitive LED indicators and a level trim, plus versatile RDL SupplyFlex power support (24 Vdc or ±12/±15 V bipolar supplies) for flexible system integration. Compact and robust, the ST-GCA3 is ideal for broadcast chains, intercoms, paging networks, and security/surveillance audio paths. Add the ST-GCA3 to your next monitoring or paging deployment to ensure uniform, professional audio performance.

• Stabilizes variable input levels to deliver consistent +4 dBu line output, improving intelligibility for paging, broadcast and security audio
• Switch-selectable SLOW or FAST AGC adapts to music or voice sources to avoid audible compression or to quickly tame bursts
• Peak-detection circuit preserves transient detail while preventing overloads for surveillance and monitoring feeds
• Built-in LED indicators and front-panel trim simplify setup and ongoing level monitoring for installers and operators
• SupplyFlex power compatibility (24 Vdc or bipolar supplies) and compact footprint speed integration into racks, intercoms and distributed systems