Bi-Directional Mic/Line Dante Interface 4 x 4 w/PoE-2 XLR In, 1 Mini-jack In, 1 Mini-jack Out, 2 Out on Rear-Panel Terminal Block-White

The RDL DD-BN31 is a white, wall-mounted 4×4 Dante interface designed for bidirectional conversion between local analog audio connections and a Dante network. Its front panel provides two female XLR mic/line inputs, one mini-jack line input, and one mini-jack line output. Two balanced line outputs are available on a detachable rear-panel terminal block. Network audio and power connect through an RJ45 port supporting 100 Mbps Dante transmission and IEEE 802.3af PoE Class 0.

Ideal Use Cases

The DD-BN31 is suited to installed audio systems that need microphone, line-level, and stereo mini-jack connectivity at a wall location. Its connection layout supports rooms where two microphones or balanced line sources must enter a Dante network while network audio is returned to local balanced or unbalanced equipment. Selectable stereo left/right or summed-mono operation gives integrators flexibility when feeding local playback systems from the available Dante channels.

Why Choose This Model

Each XLR input includes selectors for phantom power, mic/line operation, and gain. Switch-selectable P48 phantom power supplies 48 Vdc in accordance with IEC 61938:2013. Microphone gain settings are 40 dB, 48 dB, and 62 dB. The detailed gain specification lists line settings of unity, 8 dB, and 19 dB. This local control arrangement accommodates different source types without requiring the wall interface to be replaced when room requirements change.

Installation and Integration

The interface mounts in a North American dual electrical box, with a 4-square deep box recommended, or in an RDL WB-2U international wall box. The specified installation elevation is no more than 2 m. Its dimensions are 3.52 inches wide, 4.11 inches high, and 2.09 inches deep. A rear RJ45 network connector includes Link and Speed indicators, while front-panel Sync and Power indicators provide visible operating status. The PoE Class 0 power requirement allows network connection and compatible IEEE 802.3af power delivery through the installation infrastructure.

Performance Highlights

Dante audio operates at 24-bit depth with support for 44.1 kHz and 48 kHz sample rates; 48 kHz is the default. The analog-to-digital reference is specified as 20 dBFS equaling +4 dBu, with 0 dBFS equaling +24 dBu. Frequency response extends from 20 Hz to 20 kHz within ±0.5 dB, and the inputs provide 20 dB of headroom. THD+N is below 0.1% from 20 Hz to 20 kHz at +4 dBu/-20 dBFS, with 0.015% typical at 1 kHz. CMRR is greater than 65 dB from 50 Hz to 120 Hz, while crosstalk is specified below the noise floor at operating level.

The two balanced terminal-block outputs operate at a nominal +4 dBu and reach a maximum of +24 dBu. The unbalanced mini-jack output operates at -10 dBV and reaches a maximum of +10 dBV. Output impedance is 150 ohms balanced and 500 ohms unbalanced. Output THD is below 0.01% at 1 kHz, with 20 dB of headroom above the stated operating levels.

What Makes It Different

The DD-BN31 combines multiple wall-accessible analog formats in one 4×4 Dante endpoint. Two independently configurable XLR inputs handle microphone or line sources, while the front mini-jack connections accommodate an additional line input and local unbalanced output. Two balanced rear outputs support permanent wiring behind the wall plate. This mixture of front-panel access, concealed balanced outputs, selectable phantom power, and stereo or summed-mono output operation distinguishes it from an interface limited to a single connector format.

Final Assessment

For a fixed wall installation requiring two XLR mic/line inputs, mini-jack input and output connectivity, and two balanced terminal-block outputs over Dante, the DD-BN31 provides a clearly defined 4×4 connection point. Its 24-bit network audio, selectable input configuration, PoE operation, status indicators, and documented mounting options make it a focused interface for integrating local analog sources and destinations with a Dante system.