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ARX - MSX 12 - 4 Channel 3 Output Passive Splitter System

by ARX
Currently Out Of Stock

About the MSX 12
The ARX MSX 12 Transformer isolated Microphone/Line Splitter has been developed to deliver noise-free audio splitting with minimal setup time. Its intuitive layout and clear, uncluttered labelling enables a quick and easy solution to the increasing complexity of today’s standards of audio production.

The MSX 12 is a totally passive device requiring no power, and consists of Four channels of transformer isolated ultra low noise Microphone/Line Splitter. Each of these channels has a direct looped Main/FOH feed, and a transformer isolated Monitor split on the front panel.

On the rear panel is an Auxiliary transformer isolated split ideal for use with a remote recording truck or TV feed.

Marker panels on the front provide a space where individual channel connections can be noted.

The all-steel chassis of the MSX 12 provides strong interference resistant shielding. Internally, state-of-the-art transformers deliver superb audio quality and total galvanic isolation.

The MSX 12 is the easy answer to multi channel signal splitting requirements.


  • Four channel / three way split per channel
  • Passive unit - no power required
  • Ultra low noise design
  • Transformer Balanced Inputs and Outputs
  • Inputs and Main Outputs hard wired to pass Phantom Power
  • Intuitive, 'user friendly' layout
  • Flawless audio performance


  • Houses of worship
  • Conference centres
  • Educational facilities
  • Broadcast splitting

Every MSX12 is hand soldered, with a 48 hour burn in followed by a 100% re-test and visual PCB QC check prior to shipping.

Front Panel

  • 4 x Hardwired balanced XLR Input and Main Outputs. Pin 3–, Pin 2 +, Pin 1 Ground
  • 4 x Hardwired transformer isolated balanced XLR Monitor Splits. Pin 3–, Pin 2 +, Pin 1 floating (not connected)
  • Marker panel for labelling individual channel assigns

Rear Panel

  • 4 x Hardwired transformer isolated balanced XLR Auxiliary Splits. Pin 3–, Pin 2 +, Pin 1 floating (not connected)
  • 2 x D Sub connectors for Monitor Splits
  • 2 x D Sub connectors for Auxiliary Splits
  • Screw Terminal Chassis Ground point

Note: No connections to Audio ground


Input Impedance: 300 Ohms
Output Impedance: 2 secondaries @ 600 Ohms each
Frequency Response: 30Hz - 20 KHz ± 1dB
Maximum Output Level: + 20dBm
THD at Max Output: 0.2% 30 Hz - 20KHz @ 20dBm
Insertion Loss: 0.5dB @ 1 KHz (600 Ohm source & load)
Input Connectors: 3 pin female XLR wired Pin 2 + Hot, Pin 3 – Cold
Main Output: 3 Pin male XLR wired Pin 2 + Hot, Pin 3 – Cold
Monitor & Aux Output Split:  3 pin male XLR wired Pin 2 + Hot, Pin 3 – Cold. Audio grounds not connected; Pin 1 is floating.
Weight: 5 lbs (2.2 Kg)