Bi-Directional Mic/Line Dante Interface 4 x 2 w/PoE-4 XLR In, 2 Out on Rear-Panel Terminal Block-White

The RDL DD-BN40 is a white, wall-mounted, bi-directional 4×2 Dante interface designed to connect analog microphone and line signals with a Dante audio network. Four female XLR inputs are positioned on the front panel, while two balanced line outputs use a detachable rear-panel terminal block. The interface supports 24-bit audio, 44.1 and 48 kHz sample rates, 100 Mbps Ethernet, and PoE Class 0 power.

Ideal Use Cases

This model is suited to wall-mounted audio connection points where four local microphones or line-level sources must feed a Dante network and two Dante channels must return to local analog equipment. Its front-panel XLR inputs provide direct access to source connections, while the rear-panel outputs keep fixed line-output wiring behind the mounting surface. Individually selectable input settings accommodate different microphone and line signal requirements.

Why Choose This Model

Each of the four inputs includes three selectors for phantom power, mic or line operation, and gain. Switch-selectable P48 phantom power supplies 48 Vdc in accordance with IEC 61938:2013. Available microphone gain settings are 40, 48, and 62 dB, while selectable line gain is unity, 12, or 19 dB. The two outputs can operate as balanced +4 dBu or unbalanced -10 dBV connections, with the operating level selected to match the connected equipment.

The Dante connection uses an RJ45 network connector with rear-panel Link and Speed indicators. Front-panel Sync and Power indicators provide additional operating-status information. The interface transmits at 100 Mbps and supports 44.1 kHz or the default 48 kHz sample rate at a 24-bit depth.

Installation and Integration

The DD-BN40 measures 3.52 inches wide, 4.11 inches high, and 2.09 inches deep. It mounts in a North American dual electrical box, with a four-square-deep box recommended, or in an RDL WB-2U international wall box. The specified mounting elevation is no more than 2 meters.

Power is supplied through PoE Class 0 under IEEE 802.3af, allowing power and network connectivity through the Ethernet installation. The rear panel contains the RJ45 network connection and detachable output terminal block. The specified operating environment is 0° C to 40° C, with 30° C listed as the recommended maximum ambient temperature.

Performance Highlights

The analog input path has a stated frequency response of 20 Hz to 20 kHz within ±0.5 dB. Input impedance is greater than 2.5 kΩ in microphone mode and greater than 5 kΩ in line mode. At the +4 dBu/-20 dBFS operating reference, microphone input levels are -36, -44, and -58 dBu across the three gain selections. Corresponding line input levels are +4, -8, and -15 dBu. The audio operating level is defined as -20 dBFS equaling +4 dBu, while the reference level is 0 dBFS equaling +24 dBu.

Input THD+N is specified below 0.1% from 20 Hz to 20 kHz at +4 dBu/-20 dBFS, with a typical value of 0.015% at 1 kHz. CMRR is greater than 65 dB from 50 to 120 Hz. Crosstalk is specified below the noise floor from 20 Hz to 20 kHz at operating level, including at maximum microphone gain.

The outputs provide a maximum level of +24 dBu balanced or +10 dBV unbalanced. Output impedance is 150 Ω balanced and 2.5 kΩ unbalanced. Output THD is below 0.01% at 1 kHz, and available headroom above the nominal +4 dBu or -10 dBV operating level is 20 dB.

What Makes It Different

The DD-BN40 combines four accessible XLR mic/line inputs, two concealed terminal-block outputs, Dante networking, and PoE in a compact wall-mounted format. Per-input phantom, signal-type, and gain controls allow each input to be configured independently. Its balanced or unbalanced output-level selection also supports integration with equipment operating at either +4 dBu or -10 dBV nominal levels.

Final Assessment

For an installation requiring four wall-accessible analog inputs and two local analog outputs on a Dante network, the RDL DD-BN40 provides the specified connectivity in a 3.52-by-4.11-inch wall panel. Its 24-bit conversion, selectable input controls, detachable balanced output connection, status indicators, and IEEE 802.3af PoE power address both audio configuration and fixed-installation requirements.