Network to Line Level Interface-Dante Input-4 Balanced Line Outputs

Ideal Use Cases

The RDL RU-NL4 is designed for systems that need to convert four Dante network audio signals into four professional analog line-level outputs. It fits integrations where Dante transport is already present but connected equipment requires balanced +4 dBu analog feeds. Each output is provided on a detachable terminal block for permanent wiring. Rack-mounting and surface-mounting provisions support placement in an equipment rack or at another practical integration point.

With 44.1 kHz and 48 kHz sample-rate support and 24-bit conversion, the RU-NL4 provides a four-channel network-to-analog handoff at established professional operating levels. Individual signal LEDs give installers and operators a direct indication of audio activity for each of the four Dante sources.

Why Choose This Model

The RU-NL4 combines Dante reception, four-channel digital-to-analog conversion, and balanced line output in a chassis measuring 5.8 inches wide, 1.7 inches high, and 5.2 inches deep. Its outputs provide a nominal +4 dBu level with more than 18 dB of headroom. The specified audio operating relationship is 18 dBFS equals +4 dBu.

RDL analog filtering complements the 24-bit conversion stage. The interface is specified for low-noise, low-distortion operation, while output muting suppresses the analog outputs when the digital audio inputs are inactive. This combination addresses both signal quality and behavior when Dante audio is unavailable.

Installation and Integration

Dante network audio connects through an RJ45 connector with Ethernet link and speed indicators. The network transmission rate is 100 Mbps. Four balanced analog outputs are available through a detachable terminal block, with a specified output impedance of 150 ohms balanced or 75 ohms unbalanced.

The RU-NL4 requires 24 Vdc at 110 mA and includes two power connection methods: a power jack and a detachable terminal block. The listed recommended power supplies are the PS-24AS for the USA and PS-24AX for international use. PoE operation applies to the separate RU-NL4P model, which is specified as Class 0 under IEEE 802.3af and supports normal or hot-standby operation from PoE. The RU-NL4 can be equipped for either rack mounting or surface mounting.

Performance Highlights

• Four Dante network audio signals converted to four professional line-level outputs.
• 24-bit digital-to-analog conversion with 44.1 kHz and 48 kHz sample-rate support; 48 kHz is the default.
• Frequency response of 20 Hz to 20 kHz within ±0.5 dB.
• THD+N specified at less than 0.05%.
• Noise below +4 dBu specified at less than -80 dB while an output is active and less than -95 dB while outputs are muted.
• More than 18 dB of headroom above the nominal +4 dBu output level.
• Crosstalk specified at less than 85 dB from 20 Hz to 20 kHz.

The stated operating environment is 0°C to 40°C. These specifications define the unit’s expected audio bandwidth, operating level, conversion format, and environmental range without requiring assumptions about unsupported rates or formats.

What Makes It Different

Nine indicators provide immediate operating information: one power indicator, four audio-signal LEDs, two network System and Sync indicators, and two Ethernet Link and Speed indicators. This separates channel-level audio confirmation from Dante synchronization and physical network status, helping identify whether an interruption is associated with an individual source, network synchronization, or the Ethernet connection.

The combination of four balanced outputs, automatic output muting, detachable connections, and both rack and surface mounting gives the RU-NL4 a focused role as a fixed-installation Dante-to-line-level interface.

Final Assessment

The RDL RU-NL4 is a purpose-built choice for converting four Dante audio sources into four balanced professional line outputs. Its 24-bit conversion, +4 dBu nominal level, greater than 18 dB headroom, specified low-noise performance, and detailed front-panel indication provide the core functions needed for a clearly monitored network-to-analog audio connection.