Description

Powers on, but is untested. Unit does not include a power supply. Uniy has some minor cosmetic blemishes or wear and has velcro ------- Below is information borrowed from the internet: Radio Design Labs' RU-MLB4 modules are Dante audio network interface products compatible with microphones and line-level audio equipment inputs and outputs. These modules are designed to be mounted in equipment racks, closets, conference tables and on shelves or backboards in commercial/industrial installations. The RU-MLB4 is constructed in a durable, professional all-metal enclosure suitable for free-standing, surface-mounted or rack-mounted operation. This full-featured product is engineered and manufactured in the U.S.A for continuous duty in demanding installations. Built to last. Built to outperform. Radio Design Labs RU-MLB4 Module Features: -Interfaces Four Dante Inputs and Four Dante Outputs -Converts Four Standard Mic or Line Audio Sources to Dante Network Channels -Each Input is Switch-Selectable for Mic or Line -No User or Installer Gain Adjustments are Required -Automatic Microphone Gain of 40 dB for Condenser Mics and 60 dB for Dynamic Mics -P48 Phantom is Provided on Each Microphone Input Line-Level Inputs Accept Unbalanced -10 dBV or Balanced +4 dBu Signals with > 18 dB Headroom -Front-Panel Signal LED for Each Audio Input -Converts Four Dante Network Audio Signals to Balanced Line Level -Line-Level Outputs Provide +4 dBu with > 18 dB Headroom -Signal LEDs Indicate Audio for Each of the Received Network Signal Channels -High Resolution 24 Bit Analog to Digital and Digital to Analog Conversion -Legendary RDL Analog Filtering Enhances Superb Audio Performance -LED Indicators Show Network Sync Status Normal or Hot-Standby Operation from PoE (Model RU-MLB4P) -Equipped for Rack Mounting or Surface Mounting Radio Design Labs RU-MLB4 Module Specifications: 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 Levels: -18 dBFS = +4 dBu Mic Inputs: Inputs (4): Balanced, detachable terminal block Gain: Automatic; 40 dB for condenser mics, 60 dB for dynamique mics Input Level for +4 dBu: -56 dBu (dynamic), -36 dBu maximum; -36 dBu (condenser), -19 dBu maximum (unclipped), -14 dBu maximum (soft clipped) Input Impedance: > 1 kO Phantom Power: P48, 48 Vdc Standard for Phantom: IEC 61938: 2013 Frequency Response: 20 Hz to 20 kHz (± 0.5 dB) THD+N: < 0.1% Noise below +4 dBu: < -70 dB CMRR: > 70 dB (50 Hz to 120 Hz) Crosstalk: < 70 dB (20 Hz to 20 kHz) Line Inputs Inputs (8): Balanced, detachable terminal block (4); Unbalanced, detachable terminal block (4) Input Level for +4 dBu: +4 dBu (balanced); -10 dBV (unbalanced) Input Impedance: > 20 kO Frequency Response: 20 Hz to 20 kHz (± 0.5 dB) THD+N: < 0.1% Noise below +4 dBu: < -75 dB CMRR: > 60 dB (50 Hz to 120 Hz) Crosstalk: < 75 dB (1 kHz, any line to any mic channel), < 70 dB (20 Hz to 20 kHz) Headroom above +4 dBu: > 18 dB Network to Line Level Interface Section: Outputs (4): Balanced, detachable terminal block Output Level: +4 dBu (nominal) Output Impedance: 150 O balanced; 75 O unbalanced Frequency Response: 20 Hz to 20 kHz (± 0.5 dB) THD+N: < 0.05% Noise below +4 dBu: < -80 dB (output active); < -95 dB (outputs muted) Crosstalk: < 85 dB (20 Hz to 20 kHz) Headroom above +4 dBu: > 18 dB Selectors (4): MIC or LINE (rear panel) Indicators (13): Power In (1); Output Signal LEDs (4); Input Signal LEDs (4); Network Sys and Sync (2), Ethernet Link and Speed (2) Power Connections (2): Power Jack; Detachable Terminal Block Ambient Operating Environment: 0° C to 40° C Power Requirement: 24 Vdc @ 180 mA plus connected phantom loads, or PoE (RU-MLB4P) PoE (RU-MLB4P): Class 0, IEEE 802.3af No power supply ships with this unit. Item powers on but is untested