Description

Sound Devices MD-4 4-Input 4-Output Analog to Dante Audio Interface Overview:

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.

Features:

• Four front-panel, balanced, analog, mic or line level inputs with 48 V phantom power and high-pass filter
• Inputs accept mic or line level, and appear as Dante sends (transmit)
• Eight-segment LED meter for each input
• Four Dante signals (receiver) to four rear-panel XLR balanced-analog outputs
• Headphone monitoring with LED level meters, with front and rear panel headphone output
• Built-in AC power supply (100-240 V, 50/60 Hz on IEC C14) or 11-18 VDC powering (4-pin XLR)
• Durable 1-U rackmount chassis

Specifications:
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 -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)

In the Box:

• 1 x MD-4
• 1 x Power cord
• 1 x User guide