The 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 converts four Dante audio channels to balanced line level. Each output provides +4 dBu balanced for a network digital audio level of -18 dBFS. The professional output directly interfaces with other professional and commercial equipment without the need for additional gain. Crosstalk is below the noise floor between all outputs across the entire audio spectrum. The noise floor is better than 80 dB below operating level. One front-panel green signal LED corresponds to each of the four Dante input channels. Received audio level is indicated on the variable-intensity LED indicator, facilitating setup when a networked computer is not connected at the modules location.Main Features:Interfaces Four Dante Inputs and Four Dante OutputsConverts Four Standard Mic or Line Audio Sources to Dante Network ChannelsEach Input is Switch-Selectable for Mic or LineNo User or Installer Gain Adjustments are RequiredAutomatic Microphone Gain of 40 dB for Condenser Mics and 60 dB for Dynamic MicsP48 Phantom is Provided on Each Microphone InputLine-Level Inputs Accept Unbalanced -10 dBV or Balanced +4 dBu Signals with > 18 dB HeadroomFront-Panel Signal LED for Each Audio InputConverts Four Dante Network Audio Signals to Balanced Line LevelLine-Level Outputs Provide +4 dBu with > 18 dB HeadroomSignal LEDs Indicate Audio for Each of the Received Network Signal ChannelsHigh Resolution 24 Bit Analog to Digital and Digital to Analog ConversionLegendary RDL Analog Filtering Enhances Superb Audio PerformanceLED Indicators Show Network Sync StatusNormal or Hot-Standby Operation from PoE (Model RU-MLB4P)Equipped for Rack Mounting or Surface MountingSpecifications:Network Connector: RJ45 with Link and Speed indicatorsDigital Audio Ethernet Protocol: DanteTransmission Rate: 100 MbpsSample Rates Supported: 44.1 kHz, 48 kHz (default)Bit Depth Supported: 24 bitsAudio Operating Levels: -18 dBFS = +4 dBuMic InputsInputs (4): Balanced, detachable terminal blockGain: Automatic; 40 dB for condenser mics, 60 dB for dynamique micsInput 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 kPhantom Power: P48, 48 VdcStandard for Phantom: IEC 61938: 2013Frequency Response: 20 Hz to 20 kHz ( 0.5 dB)THD+N: < 0.1%Noise below +4 dBu: < -70 dBCMRR: > 70 dB (50 Hz to 120 Hz)Crosstalk: < 70 dB (20 Hz to 20 kHz)Line InputsInputs (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 kFrequency Response: 20 Hz to 20 kHz ( 0.5 dB)THD+N: < 0.1%Noise below +4 dBu: < -75 dBCMRR: > 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 dBNetwork to Line Level Interface SectionOutputs (4): Balanced, detachable terminal blockOutput Level: +4 dBu (nominal)Output Impedance: 150 balanced; 75 unbalancedFrequency 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 dBSelectors (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 BlockAmbient Operating Environment: 0 C to 40 CPower Requirement: 24 Vdc @ 180 mA plus connected phantom loads, or PoE (RU-MLB4P)PoE (RU-MLB4P): Class 0, IEEE 802.3afDimensions: 5.8″ (15 cm) W; 1.7″ (4.3 cm) H; 5.2″ (13.2 cm) DPackage Type: Cardboard BoxPackage Dimensions: 6 x 6 x 2.625 in.Shipping Weight: 1.805 lbs. (RU-MLB4); 1.805 lbs. (RU-MLB4P)WEEE weight: 1.545 lbs. (RU-MLB4); 1.545 lbs. (RU-MLB4P)Tariff code: 8543.70.9100