MD-4

4-Input, 4-Output Analog-to-Dante Interface

MD-4-S
User Guide

The MD-4 4×4 Analog-to-Dante Interface with Headphone Monitor is a simple, high-performance interface for connecting analog audio to Dante™ audio networks.

Four high-gain microphone or line-level inputs are available for connection to a Dante audio network. Additionally, four Dante signals can be sent to its four balanced analog outputs. Inputs or outputs can be routed to headphones for signal monitoring and metering. The MD-4 is an ideal companion in a rack with the Sound Devices 970 audio recorder.

MD-4_graphics-S

Features

Technical Details
Network Audio Technology
Type: Dante audio-over-Ethernet
Bit Depth: up to 24
Sampling Rate: 48 kHz
Number of Transmitter (Output) Channels: 4
Number of Receiver (Input) Channels: 4
Dante Audio Flows: 4; 2 transmitter, 2 receiver
Network Interface
Type: twisted-pair Ethernet
Data Rate: 100 Mbs (10 Mbs not supported; 1000 Mbs “GigE” Ethernet not supported unless falls back to 100 Mbs)
Mic/Line Inputs: 4
Compatibility: dynamic or phantom-powered mics; line-level sources
Type: 3-pin female XLR, analog, electronically balanced, capacitor coupled
Impedance: 4 k ohms, nominal
Gain: 0 dB (line), 10 dB, 19-70 dB in 3 dB steps (total 20 choices)
Maximum Level: +18, +20, or +24 dBu, configurable, 0 dB gain selected, results in Dante digital output level of 0 dBFS
EIN: –123 dBu, 22 kHz bandwidth, 70 dB gain, 150 ohm source resistance
Dynamic Range: >116 dB, 0 dB gain, A-weighted
Distortion (THD+N): more than 0.001% (–101 dB) at –1 dBFS, 40 dB gain, 22 kHz bandwidth
Frequency Response: +0.0/–0.5 dB, 22 Hz to 22 kHz, HPF off
High-Pass Filter (HPF): –6 dB at 75 Hz, 18 dB per octave, on/off selectable per channel
Phantom Power: P48 per IEC 61938:2013 standard, +46 volts DC nominal, on/off selectable per channel
Meters: 4, one 8-segment LED per input
Status LEDs: 3, P48, HPF, input channel selected
Line Outputs: 4
Type: analog, electronically balanced, capacitor coupled, intended to drive balanced or unbalanced loads of 2k ohms or greater, 3-pin XLR
Source Impedance: 200 ohms
Nominal Level: +4, 0, or –2 dBu, selectable, reference –20 dBFS
Maximum Level: +18, +20, or +24 dBu, configurable, with 0 dBFS on Dante input
Dynamic Range: >119 dB, A-weighted
Distortion (THD+N): 0.0012% (–99 dB), measured at –1 dBFS, 22 kHz bandwidth
Frequency Response: ±0.1 dB, 20 Hz to 20 kHz
Audio Monitor:
Source: mic/line inputs or line outputs, selectable as monaural or stereo
Meters: 2, 8-segment LED
Headphone/Monitor Output:
Type: stereo (dual-channel), when jack on front panel is used jack on back panel automatically disconnects
Compatibility: intended for connection to stereo headphones with nominal impedance of 100 ohms or greater
Maximum Output Voltage: 4.9 volts RMS, 1 kHz, 150 ohm load
Frequency Response: +0/–1.4 dB, 20 Hz to 20 kHz
Distortion (THD+N): 0.005%
Dynamic Range: >100 dB
Connectors:
Ethernet: Neutrik etherCON RJ45
Headphone Outputs: 3-conductor ¼-inch jack
Factory: USB type A receptacle used only for application firmware updates
AC Mains: 3-blade, IEC 320 C14-compatible (mates with IEC 320 C13)
DC Input: 4-pin male XLR
Power Source:
AC Mains: 100 to 240 volts, +10/–15%, 50/60 Hz, 15 watt maximum
DC Input: 10-18 volts DC, 0.x A maximum @ 12 volts; 1.1 A maximum @ 10 volts; current draw when AC present is less than 100 uA
Chassis Dimensions:
19.0 inches wide (48.3 cm)
1.72 inches high (4.4 cm)
8.4 inches deep (21.3 cm)
1U in a standard 19-inch rack
Stereo Out
2ch unbalanced stereo 3.5 mm for use with > 6k ohm inputs
Max Stereo Out Level: '+7.8dBu 100Kohm load
Headphones Out: 3.5 mm Stereo
Weight:
3.5 pounds (1.6 kg)
Specifications and information contained in this User Guide are subject to change without notice.