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Codec for Studio Transmitter Links (STL).

LX400 STL is the latest Barix Broadcast Codec with advanced features for cost effective, quality audio delivery. Key features include support for OPUS, AACplus and PCM uncompressed transmission, absolute end-to-end delay control (RTP), latest security (HTTPS) and stream redundancy modes for uninterrupted broadcasting. Additionally, it offers 8 I/O contacts and AES3 compatibility on Studiohub output only. Power redundancy via 24 VDC and PoE is supported



Power supply

  • 802.3af PoE on RJ-45 connector
  • 24 VDC nominal, 12 Watt max.on terminal block


  • 10/100Mbps auto rate, full/half duplex
  • RJ-45 connector with integrated Link/Activity
  • 802.3af PoE support
  • Second 10/100 Ethernet port for future software support

Digital Audio Interface

  • AES3 on Studiohub (output only)


  • USB connector type A female.
Analog audio Interfaces

  • Balanced Audio input and output, Stereo, on separate Studiohub (RJ45) connectors
  • Differential input, 18kOhm input impedance
  • Software Switchable level/sensivity (+6dbu/+24dbu)
  • Frequency response (-1dB) 20..20‘000 Hz (depends on used codec, best results @48kHz PCM)
  • Signal to Noise Ratio 87dB,THD 0.01%
  • Stereo crosstalk -88 dB
  • Input and output level software controllable



  • For serial metadata gateway or custom functions

Contact input

  • 8 relay contacts, 24V 0.5A, normally open


  • 8 relay contacts, 24V 0.5A, normally open

  • Aluminum case, 620g
  • Dimensions 216 x 38 x 125 mm
  • (8.5 x 1.5 x 4.92” inch)
  • rack and wall mountable using optional accessories

Supported Audio formats

  • OPUS
  • PCM uncompressed
  • AAC+
  • **depends on used codec, best results @48kHz PCM


LX400 STL Package (made in Europe)

2024.9439P LX400 STL Package


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