RDL DDB-RN31

Overview

The DDB-RN31 is a complete wall-mounted Dante audio network interface. It features two XLR mic or line inputs, one stereo Mini-jack line input, left and right RCA jack inputs and one stereo Mini-jack line output on the front panels, plus two line outputs on a rear-panel detachable terminal block. The module is configured and adjusted using RDL CONSOLE or other network control software. The DD-RN31 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-RN31 is PoE powered, and is available in multiple finishes with optional customised graphics.

Mic/Line to network section

The two XLR inputs are each converted to a separate Dante network transmit channel. Gain settings are software-selectable for both the mic and line input ranges to match condenser or dynamic mic levels and standard line levels. P48 phantom voltage may be software enabled when an input is set for mic level.

Line to network section

The Mini-jack and RCA jack left and right inputs each provide a network digital audio level of -18 dBFS for an unbalanced -10 dBV input. The control software allows each of these inputs to feed either or both of two Dante channels. Multiple sources fed to a single Dante output are summed.

Network to line section

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 -18 dBFS.

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 -18 dBFS.

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

The DDB-RN31 is a professional grade product with RDL mic preamplifiers for studio quality fidelity and low noise performance, coupled through XLR jacks housed in a steel chassis with dual powder-coated or stainless steel DecoraÂ® front plates.

The DDB-RN31’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	-18 dBFS = +4 dBu
Reference Level	0 dBFS = +22 dBu
Inputs (2)	XLR (female)
Gain	Mic: 35 dB (LOW), 42 dB (MED), 59 dB (HIGH); Line: Unity (NORM), 12 dB (HIGH)
Input Level (for +4 dBu/-18 dBFS)	Mic: -31 dBu (LOW), -38 dBu (MED), -55 dBu (HIGH); Line: +4 dBu (LOW), -8 dBu (HIGH)
Input Level (maximum)	Mic: -14 dBu (LOW), -21 dBu (MED), -38 dBu (HI); Line: +23 dBu (LOW), +10 dBu (HIGH)
Input Impedance	> 1.2 kΩ
Phantom Power	P48, 48 Vdc, software-selectable
Standard for Phantom	IEC 61938: 2013
Selectors per input (2)	Phantom, Gain, software-selectable
Frequency Response	20 Hz to 20 kHz (± 0.5 dB)
Equivalent Input Noise	< -128 dBu (59 dB gain); < -130 dBu A-Weighted
Noise below -18 dBFS (20 to 20 kHz)	Mic: < -88 dB (LOW), < -82 dB (MED), < -68 dB (HIGH); Line: < -88 dB (NORM), < -88 dB (HIGH)
THD+N	< 0.1% (20 Hz to 20 kHz, +4 dBu/-18 dBFS)
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)
Inputs (4)	Mini-jack Stereo (2, L and R); RCA jacks (2, L and R)
Input Level (for +4 dBu/-18 dBFS)	-10 dBV nominal
Input Level (maximum)	+8 dBV
Input Impedance	> 50 kΩ
Selectors	Stereo (L and R)/Mono (summed), software-selectable
Frequency Response	20 Hz to 20 kHz (± 0.2 dB)
Noise below -18 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/-18 dBFS); 0.01% at 1 kHz (typ)
Outputs (4)	Balanced, detachable terminal block (2); Unbalanced, Mini-jack (2, L and R)
Output Level (operating)	+4 dBu (nominal) balanced, software adjustable in 1 dB steps; -10 dBV (nominal) unbalanced
Output Level (maximum)	+22 dBu balanced; +8 dBV unbalanced
Output Impedance	150 Ω balanced, 100 Ω unbalanced
Frequency Response	20 Hz to 20 kHz (± 0.5 dB)
THD+N	< 0.05%
Noise	< -88 dB (bal., below +4 dBu); < -106 (bal., below +22 dBu); < -90 dB (unbal., below -10 dBV)
Crosstalk	< -70 dB (bal., 20 Hz to 20 kHz); < -80 dB (unbal., 20 Hz to 20 kHz)
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
Package Type	Cardboard Box
Package Dimensions	3.625 x 4.625 x 2.125 in.
Shipping Weight	0.92 lbs.
WEEE weight	0.765 lbs.
Tariff code	8543.70.9100

Key Features

Dante Network Interface for Four Audio Inputs and Four Audio Outputs
One Mini-Jack, Two RCA Jacks and Two XLR Front-Panel Inputs
One Mini-Jack Front-Panel Output; Two Balanced Outputs on Rear-Panel Terminal Block
Module is Configured and Adjusted Using Network Control Software
Converts Two Standard XLR Mic or Line Audio Sources to Dante Network Channels
Each Input Gain is Selected by Software
Mic Gain: 35 dB, 42 dB or 59 dB
Line Gain: Unity or 12 dB
48 V Mic Phantom (P48) Selected by Software
Each Mini-Jack and RCA -10 dBV Input May Feed One or Two Dante Network Channels
Converts Four Dante Network Audio Signals to Line Level
Mini-Jack -10 dBV Stereo Output from Two Specific Dante Channels
Rear Panel Balanced Outputs from Two Specific Dante Channels
Each Rear Panel +4 dBu Output Equipped with Software Controlled Attenuator in 1 dB Steps
Studio Quality, Low-Noise Performance
High Resolution 24 Bit Analog to Digital and Digital to Analog Conversion
Legendary RDL Analog Filtering Enhances Superb Audio Performance