RDL RU-LB4P – 4x4 Line-Level Dante Network Interface with PoE

What is the RDL RU-LB4P?

The RDL RU-LB4P is a 4 x 4 line-level Dante network interface that converts four balanced or unbalanced line sources to Dante and four Dante channels to +4 dBu balanced outputs. Front-panel gain trimmers with dual-LED VU meters on every input make level matching quick without a computer. It runs on PoE with optional 24 Vdc hot standby, in an all-metal Rack-Up enclosure for racks, closets, tables and backboards.

How does it work?

Each input accepts the full range of unbalanced -10 dBV and balanced +4 dBu line-level sources, with an input range of -16 dBu to +12 dBu and more than 18 dB of headroom. A front-panel gain trimmer and dual-LED VU meter on each input set an operating level that preserves full headroom with the lowest noise floor. On the output side, four Dante channels are converted to +4 dBu balanced for -18 dBFS, so they interface directly with professional and commercial equipment without extra gain. Crosstalk between outputs is below the noise floor across the audio band, and the noise floor is more than 80 dB below operating level. Green signal LEDs show the level of each received Dante channel, which helps setup when no networked computer is at the rack. The RU-LB4P runs from a PoE switch (Class 0, IEEE 802.3af); when an external 24 Vdc supply is also connected it runs from that supply and switches to PoE if the supply is lost. RDL recommends the PS-24AS (USA) or RDL PS-24AX (international) supply for standby power. Mounting options include the RU-SMA1 mounting plate, RU-BR1 bracket, DRA-35R DIN rail adapter, RU-HRA1 rack mount and RC-1UR rack chassis.

What are the key features?

• 4 x 4 line-level Dante I/O — Four line inputs to Dante and four Dante channels to balanced line outputs in one module.
• Front-panel gain trims — Each input has a gain trimmer for precise level matching.
• Dual-LED VU meters — Per-input metering shows the correct operating level at a glance.
• Balanced or unbalanced sources — Inputs accept -10 dBV unbalanced or +4 dBu balanced line levels.
• +4 dBu outputs — Balanced outputs drive professional equipment directly with more than 18 dB of headroom.
• Low noise and crosstalk — Output noise is better than 80 dB below operating level, with crosstalk below the noise floor.
• PoE with hot standby — Runs on PoE alone or with a 24 Vdc supply and automatic failover.
• Rack-Up mounting — Free-standing, surface, DIN rail or rack mounting with RDL Rack-Up accessories.

Where is it typically used?

• Conference room
• Boardroom
• Training room
• Multi-purpose room
• House of worship
• Auditorium

Technical Specifications

Frequently Asked Questions