RDL ST-CL2 Compressor/Limiter, Line Level

Maintain consistent, intelligible audio and protect downstream gear in live sound, broadcast, and installed AV environments. The Radio Design Labs ST-CL2 line-level compressor/limiter is a pro audio processing module designed to deliver smooth, low-noise gain control and effective peak protection across variable program material. With line-level inputs and outputs that can be wired balanced or unbalanced, the ST-CL2 adapts to studio mixers, professional racks, and security/surveillance monitoring stations. Internal multi-stage detectors and a soft-knee compression curve automatically adjust threshold and ratio to match speech and music, while two LEDs show incremental compression ranges for quick level setting. The result is transparent, professional sounding audio with minimal setup—ideal for conference rooms, paging systems, CCTV audio feeds and distributed monitoring systems. Lightweight, bracket- or rack-mountable and compatible with RDL SupplyFlex DC power configurations, the ST-CL2 integrates easily into existing installations. Improve intelligibility, prevent clipping, and streamline audio management—add an ST-CL2 to your next mixer, security console, or AV rack.

• Keeps program audio consistent and intelligible with automatic soft-knee compression for clear speech and music
• Protects downstream equipment with tight peak control and multi-stage incremental gain reduction
• Low-noise line-level processing (balanced or unbalanced) for professional installations and mixers
• Simple setup with LED range indicators and automatic operation—minimal tuning required for live, AV, or surveillance systems
• Flexible mounting and power options (bracket/rack mount, DC SupplyFlex) for integration into security, monitoring, and broadcast racks