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Bi-directional mono opus codec with SIP link negotiation.

The BARIX MA400 SIP Opus Codec allows to establish a link between devices using standard SIP protocol and server. The unit provides an Opus encoded bi-directional mono link with microphone or line input and line and speaker output on both sides. This makes the BARIX MA400 SIP Opus Codec the ideal product for audio distribution or contribution in a SIP based environment.


3af PoE on RJ-45 connector

48 VDC nomimal, 12 Watt max.


10/100Mbps auto rate, full/half duplex

RJ-45 connector with integrated Link/Activity


3af PoE support

Protocols: TCP/IP, UDP, RTP, DHCP, Multicast capable

Audio Input

Characteristics/mode selectable by software:

“Mic” mode: tba, bias power for electret microphone supplied

“Line” mode: 2kΩ input impedance

9 VPP max, adjustable in sensitivity

Frequency response 20 Hz .. 18 kHz (-3dB)*

Dynamic range 87 dB, SNR -87 dB, THD <0.1%

(-3 dBFS)*


Aluminum case, 280g

Dimensions 108 x 38 x 78.7 mm

(4.25 x 1.5 x 3.1” inch)

rack and wall mountable using optional accessories MTBF

500 000h (according to MIL217F at 25°C)

Analog Line Output (mono)

Transformer isolated, balanced (600 Ω) Output level software controllable

Full scale output voltage: 5.7 dBu, 4.2 VPP,

7 dBm @ 600 Ω

Frequency response 30 Hz .. 18 kHz (-3dB)*

Dynamic range 88 dB, SNR -88 dB, THD

<tba% (-3dBFS)*

Speaker out

Suggested speaker impedance 8Ω (min.)

5 Watt max output power @ 8Ω

Values @ 8Ω:

Frequency response 25 Hz .. 12 kHz (-3dB)*,

Dynamic range tba, SNR tba, THD <1% (-3dBFS)*

Supported Audio formats


711 (alaw ulaw) G.722





  • 2019.9260 MA400 SIP Opus Codec

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