RDL RU-MLB4 Rack-Up Series Mic Line Bi-Directional Network Interface

Bring reliable, networked audio to AV, security and surveillance installations with the Radio Design Labs RU-MLB4 mic/line bi-directional network interface. This pro audio processor converts four standard mic or line sources into four Dante channels while also delivering four balanced line-level outputs — making it ideal for monitoring, paging, and recording applications where clean, consistent audio is critical.

Installer-friendly features remove guesswork: each input is switch-selectable for mic or line, with automatic microphone gain (40 dB for condenser, 60 dB for dynamic) and 48V phantom power on every mic input. The RU-MLB4 accepts both unbalanced -10 dBV and balanced +4 dBu line signals with generous headroom, so mixed equipment environments stay accurate and distortion-free. Front-panel signal LEDs provide instant input monitoring during setup and troubleshooting.

Designed for integrators, technicians and systems professionals, the RU-MLB4 streamlines Dante network audio deployments in corporate AV, security monitoring and surveillance systems. Add this compact, dependable interface to your next Dante installation to simplify wiring, reduce setup time and ensure predictable mic/line performance.

• Seamlessly convert four mic/line sources to Dante channels for simple networked audio integration
• Automatic mic gain (40 dB condenser / 60 dB dynamic) and per-channel 48V phantom power for consistent, plug-and-play microphone performance
• Accepts unbalanced -10 dBV and balanced +4 dBu line inputs to handle consumer and pro audio sources without manual adjustments
• Bi-directional Dante I/O with balanced line-level outputs simplifies AV, security, and surveillance system wiring
• Compact rack-up form factor and 24V DC operation for easy installation in equipment racks, mobile carts, and remote monitoring sites