RDL DD-BN31

Overview

The DD-BN31 is a complete wall-mounted Dante audio network interface. It features two XLR mic or line inputs, one stereo Mini-jack line input and one stereo Mini-jack line output on the front panels, plus two line outputs on a rear-panel detachable terminal block. Special software is not required to configure the DD-BN31. Each XLR input provides three switches that may be set from the front of the unit when the cover plate is not installed. One switch enables or disables P48 phantom for that input; the second switch selects the mic or line gain range; the third switch sets the gain. The Mini-jack input provides a switch to configure the input for stereo or summed mono. The Mini-jack output provides a switch to configure the output for stereo or left-channel mono. Each rear-panel output provides a switch to set the output to balanced professional or unbalanced consumer level. The DD-BN31 fits a standard US dual-gang electrical box or an RDL WB-2 back box for installations in thinner European or equivalent walls. The DD-BN31 is PoE powered, and is available in multiple finishes with optional customised graphics.

The two XLR inputs are each converted to a separate Dante network transmit channel. Three gain settings are switch-selectable for both the mic and line input ranges to match condenser or dynamic mic levels and standard line levels.

The Mini-jack left and right inputs are each converted to a separate Dante network transmit channel. Each input provides a network digital audio level of -20 dBFS for an unbalanced -10 dBV input. The input is equipped with a selector to sum the left and right Mini-jack inputs. The summed signal feeds both Dante transmit channels.

Two Dante audio channels are converted to unbalanced line level to feed the front-panel Mini-jack. Each channel provides -10 dBV unbalanced for a network digital audio level of -20 dBFS. The left and right Mini-jack channels are normally fed from Dante receive channels 3 and 4 (stereo). The Mini-jack output is equipped with a selector to feed both output channels from Dante receive channel 3 (mono). This selector may be set from the front of the unit when the cover plate is not installed.

Two Dante audio channels are converted to balanced line level on the rear-panel detachable terminal block. Each output provides +4 dBu balanced for a network digital audio level of -20 dBFS. Each output is equipped with a selector to unbalance the audio and attenuate the level to -10 dBV. These switches are located on the top of the chassis and are set by the installer prior to mounting the unit.

The rear-panel outputs are intended for connection to RDL AMS connectors mounted in Decora-style plates that match the DD-BN31. AMS audio connectors include RCA, Mini and XLR jacks. The output plate may be located together with the DD-BN31 in a triple gang box or may be mounted remotely in a single box.

Valid PoE power and synchronization to the Dante network are indicated by green LEDs visible from the front of the unit.

The DD-BN31 is a professional grade product with discrete mic preamplifiers for studio quality fidelity and low noise performance, coupled through metal XLR jacks housed in a stainless steel chassis with dual powder-coated or stainless steel Decora front plates.

The DD-BN31’s superior performance specifications make it ideally suited to the most demanding installations, and an exceptional value in commercial networked audio systems. This full-featured product is engineered and manufactured in the U.S.A for continuous duty in demanding installations. Designed to outperform. Built to last.

Specifications

Mic/Line Inputs to Network Interface
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
Line Inputs to Network Interface
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
Network to Line Outputs
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	< .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	0° C to 40° C; 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
Mounting	Wall mount in North American dual electrical box (4 square deep recommended) or RDL WB-2U (international wall box) at elevation ≤ 2 m.
Package Type	Cardboard Box
Package Dimensions	3.625 x 4.625 x 2.125 in.
Shipping Weight	1.045 lbs.
WEEE weight	0.89 lbs.
Tariff code	8543.70.9100