RDL DDB-BN31 – Black 4x4 Dante Mic/Line Wall Plate Interface
RDL DDB-BN31 – Black 4x4 Dante Mic/Line Wall Plate Interface is backordered and will ship as soon as it is back in stock.
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RDL DDB-BN31 – Black 4x4 Dante Mic/Line Wall Plate Interface
What is the RDL DDB-BN31?
The RDL DDB-BN31 is a wall-mounted 4 x 4 Dante mic/line interface in a black Decora-style finish. It provides two front-panel XLR mic/line inputs and a stereo mini-jack line input, along with a front-panel stereo mini-jack output and two balanced line outputs on a rear-panel terminal block. It converts four analog sources to Dante network channels and returns four Dante channels to analog, all powered from a single PoE network connection. Every setting is made with on-board switches, so integrators can commission a Dante wall plate in a conference room, training room or multi-purpose space without special configuration software.
How does it work?
The DDB-BN31 installs in a standard North American dual-gang electrical box (4" square deep recommended) or an RDL WB-2U international wall box for thinner European-style walls. Each XLR input has three switches, reachable from the front with the cover plate removed: one enables P48 phantom power, one selects the mic or line range and one sets the gain. Mic gain is switch-selectable at 40 dB, 48 dB or 62 dB to suit dynamic or condenser microphones, and each XLR input feeds its own Dante transmit channel. The front-panel stereo mini-jack input feeds two Dante transmit channels at -20 dBFS for a -10 dBV source, and a selector sums left and right to mono for single-channel playback devices. The front-panel mini-jack output normally carries Dante receive channels 3 and 4 in stereo, or channel 3 to both sides in mono mode. The rear-panel terminal-block outputs deliver +4 dBu balanced for a -20 dBFS network level, and a per-output switch on top of the chassis converts each one to -10 dBV unbalanced for consumer equipment. Those outputs are intended for RDL AMS connector modules (RCA, mini-jack or XLR) in matching Decora plates, which can share a triple-gang box with the interface or mount remotely in a single-gang box. Green front-panel LEDs confirm valid PoE power and Dante network sync, which speeds up troubleshooting during commissioning. Discrete mic preamplifiers, 24-bit A/D and D/A conversion and metal XLR jacks in a stainless steel chassis give studio-grade fidelity in a commercial wall plate built in the U.S.A. For a finished black install, use the RDL CP-2B double cover plate, or the RDL CP-3B triple cover plate when an AMS output plate shares the box. AMS connector modules such as the AMS-XLM XLR male jack, AMS-XLRMA mic/line XLR output and AMS-1/8F stereo mini-jack complete the output connections.
What are the key features?
- 4 x 4 Dante I/O — Converts four analog inputs to Dante and four Dante channels back to analog in one wall plate.
- No software required — All gain, phantom and output settings are made with on-board switches, so setup does not depend on a laptop or plug-in.
- Switchable mic/line XLR inputs — Each XLR input selects mic or line range with three gain steps per range to match condenser, dynamic or line sources.
- P48 phantom power — Phantom power is switch-selectable per XLR input to IEC 61938 for condenser microphones.
- Stereo mini-jack I/O — Front-panel mini-jack input and output each switch between stereo and mono for laptops and personal devices.
- Selectable output level — Each terminal-block output switches between +4 dBu balanced and -10 dBV unbalanced.
- Low-noise preamps — Discrete mic preamplifiers achieve -130 dBu equivalent input noise at 62 dB gain.
- 24-bit conversion — Dante audio runs at 24 bits with 44.1 kHz or 48 kHz sample rates and a 20 Hz to 20 kHz (±0.5 dB) response.
- PoE powered — Runs on PoE Class 0 (IEEE 802.3af), so no local power supply is needed at the wall.
- Decora wall mounting — Fits a North American dual-gang box or RDL WB-2U wall box with a black Decora-style front plate.
- Status LEDs — Front-panel LEDs show PoE power and Dante sync, with Ethernet link and speed LEDs on the rear.
Where is it typically used?
- Conference room
- Boardroom
- Training room
- Multi-purpose room
- House of worship
Technical Specifications
| Model | DDB-BN31 (black finish) |
| Network Connector | RJ45 with Link and Speed indicators |
| Digital Audio Ethernet Protocol | Dante |
| Transmission Rate | 100 Mbps |
| Sample Rates Supported | 44.1 kHz, 48 kHz (default) |
| Bit Depth Supported | 24 bits |
| Audio Operating Level | -20 dBFS = +4 dBu |
| Reference Level | 0 dBFS = +24 dBu |
| Inputs (2): XLR (female) | |
| Gain | Mic: 40 dB (LO), 48 dB (MED), 62 dB (HI); Line: Unity (LO), 8 dB (MED), 19 dB (HI) |
| Input Level (for +4 dBu/-20 dBFS) | Mic: -36 dBu (LO), -44 dBu (MED), -58 dBu (HI); Line: +4 dBu (LO), -8 dBu (MED), -15 dBu (HI) |
| Input Level (maximum) | Mic: -16 dBu (LO), -24 dBu (MED), -38 dBu (HI); Line: +24 dBu (LO), +12 dBu (MED), +5 dBu (HI) |
| Input Impedance | > 2.5 kΩ (MIC); > 5 kΩ (LINE) |
| Phantom Power | P48, 48 Vdc, switch-selectable |
| Standard for Phantom | IEC 61938: 2013 |
| Selectors per input (3) | Phantom, Mic/Line, Gain |
| Frequency Response | 20 Hz to 20 kHz (± 0.5 dB) |
| Equivalent Input Noise | -130 dBu (62 dB gain); -132 dBu A-Weighted |
| Noise below -20 dBFS (20 to 20 kHz) | Mic: < -72 dB (LO), < -72 dB (MED), < -68 dB (HI); Line: < -72 dB (LO), < -72 dB (MED), < -70 dB (HI) |
| THD+N | < 0.1% (20 Hz to 20 kHz, +4 dBu/-20 dBFS); 0.015% at 1 kHz (typ) |
| CMRR | > 65 dB (50 Hz to 120 Hz) |
| Crosstalk | Below Noise Floor (20 Hz to 20 kHz at operating level, any input to any input, max. mic gain) |
| Headroom | 20 dB |
| Inputs (2): Mini-jack Stereo (2, L and R) | |
| Input Level (for +4 dBu/-20 dBFS) | -10 dBV nominal |
| Input Level (maximum) | +10 dBV |
| Input Impedance | > 50 kΩ |
| Selectors | Stereo (L and R)/Mono (summed) |
| Frequency Response | 20 Hz to 20 kHz (± 0.2 dB) |
| Noise below -20 dBFS (20 to 20 kHz) | < -85 dB |
| Crosstalk | < -85 dB (1 kHz); < -65 dB (L into R, R into L, 20 Hz to 20 kHz) |
| THD+N | < 0.05% (20 Hz to 20 kHz, +4 dBu/-20 dBFS); 0.01% at 1 kHz (typ) |
| Headroom | 20 dB |
| Outputs (4): Balanced, detachable terminal block (2); Unbalanced, Mini-jack (2, L and R) | |
| Output Level (operating) | +4 dBu (nominal) balanced; -10 dBV unbalanced |
| Output Level (maximum) | +24 dBu balanced; +10 dBV unbalanced |
| Output Impedance | 150 Ω balanced; 500 Ω unbalanced |
| Frequency Response | 20 Hz to 20 kHz (± 0.5 dB) |
| THD+N | < 0.1% |
| THD | < .01% (1 kHz) |
| Noise | < -78 dB (bal., below +4 dBu); < -98 (bal., below +24 dBu); < -75 dB (unbal., below -10 dBV) |
| Crosstalk | Below Noise Floor (1 kHz); < -60 dB (bal., 20 Hz to 20 kHz); < -80 dB (unbal., 1 kHz), < -70 dB (unbal., 20 Hz to 20 kHz) |
| Headroom above +4 dBu or -10 dBV | 20 dB |
| Indicators (4) | Ethernet Link and Speed (2, rear panel); Sync and Power (2, front panel) |
| Ambient Operating Environment | 32° F to 104° F (0° C to 40° C); 86° F (30° C) maximum recommended |
| Power Requirement | PoE Class 0, IEEE 802.3af |
| Specification Conditions | Gain/Level: ± 1 dB; Source termination: 150 Ω; A to D values measured in digital domain |
| Dimensions | 3.52" (8.94 cm) W; 4.11" (10.44 cm) H; 2.09" (5.31 cm) D |
Frequently Asked Questions
Do I need software to configure it?
No. The DDB-BN31 is set up entirely with on-board switches for phantom, mic/line range, gain and output level. Dante routing is handled on the Dante network as with any other Dante device.
How is it powered?
It is powered by PoE Class 0 (IEEE 802.3af) from a PoE network switch or injector. No local power supply is required.
What back box does it need?
A North American dual-gang electrical box (4" square deep recommended) or an RDL WB-2U international wall box, mounted at an elevation of 6.5 ft (2 m) or lower.
Can it power condenser microphones?
Yes. P48 phantom power is switch-selectable on each XLR input, and the gain switch offers 40 dB, 48 dB or 62 dB in the mic range.
How do I connect the rear-panel outputs?
The detachable terminal-block outputs are intended to wire to RDL AMS connector modules (RCA, mini-jack or XLR) in a matching Decora plate, either in a triple-gang box with the interface or in a separate single-gang box.
Which sample rates does it support?
It supports 44.1 kHz and 48 kHz (default) at 24 bits, with -20 dBFS aligned to +4 dBu.
What warranty does it carry?
This product is covered by a 7-year RDL warranty. For warranty claims, RMAs or support, contact Creation Networks at (888) 230-3661 or sales@creationnetworks.net.
Can Creation Networks help design the system?
Yes. Our team specifies, programs and installs Dante wall plates and networked audio systems for commercial projects nationwide. Call (888) 230-3661 for a quote or design review.
At Creation Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
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