ST-GSP1

RDL ST-GSP1 - Gated Speech Preamplifier - Microphone to Line

The RDL ST-GSP1 is a compact gated speech preamplifier designed to automatically switch a microphone signal to line level when speech is detected. Ideal for voice-activated systems, paging, conferencing, or integration into automatic mixing setups, the module provides fast and silent audio switching with built-in single-ended noise reduction.

The MIC input supports both balanced and unbalanced wiring and includes a phantom power terminal for condenser microphones (up to 48 Vdc, internally filtered). Adjustable gain and threshold settings allow the unit to accommodate a wide range of microphone types and acoustic environments. An open-collector logic output enables triggering of external devices or other RDL modules.

Functionality

• Voice-activated microphone-to-line preamplifier
• Automatic gating with fast, silent switching
• Built-in noise reduction
• Adjustable gain and threshold
• Phantom power support for condenser microphones
• Open-collector logic output for external control

Features

• Device type: gated microphone preamplifier
• Input: balanced or unbalanced microphone input
• Phantom power: up to 48 Vdc, internally filtered
• Gain: adjustable for low- and high-output microphones
• Output: line level, balanced or unbalanced
• Noise reduction: integrated, single-ended
• Logic output: open-collector
• Power: 24 Vdc, 80 mA
• Operating temperature: 0°C to 55°C

The RDL ST-GSP1 is a reliable and flexible solution for AV professionals seeking automatic microphone activation in professional audio systems. Its compact design and integration capabilities make it ideal for modern conferencing, paging, and voice-operated installations.