Octopus USB Base Unit (MT454)

By October 22, 2016 November 3rd, 2020 No Comments

Octopus USB Base Unit – MT454

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The Octopus is an Audio Conferencing Mixer that gives you crystal clear audio. Using the Octopus allows you the freedom to mount microphones and speakers anywhere in the room (ceiling, walls, and table tops) for professional sound and a sleek look. The Octopus has a high powered DSP and technology that automatically monitors and mixes the audio. Although this may sound complicated we designed it for simple set-up & use, giving you a “set it and forget it” solution.

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Each Octopus has four microphone inputs (each input can also be designated as a unique auxiliary or sound reinforcement channel), however, the Octopus provides unlimited daisy chain capability, and allows for multiple connectivity options. It comes standard with USB and RCA connectors for VoIP and Video Codec connectivity, with the option of adding a PSTN (analog telephone) interface or a digital telephone interface. The Phoenix Octopus can be ordered with an optional 40 watt, 4-output amplifier for powering speakers.

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Space :


Interface :



Features :



  • Echo Cancellation
  • Noise Suppression
  • Full Duplex Communication
  • De-reverb Filtering
  • Automatic Gain Control
  • Phantom Power Supply (3V & 24V)
  • Beamforming Microphone Array Technology (The Octopus will assess the signals picked up by all the microphones, and decide, instantaneously, which one(s) will take part in the mixing and with what level of emphasis)
  • Bridging (Bridging allows for 3-way communication between multiple connection sources, such as telephone, VoIP and Video Codec)


  • USB cable
  • International power supply adaptor
  • 2 rack mount ears
  • Male Phoenix speaker output connector
  • User manual

Octopus USB Base Unit (MT454) connects via Digital Output – USB to your computer – this connection is for any session using your computer, such as Voice Over IP applications (Skype, Vidyo, etc.).

Analog Output – RCA, XLR, Phoenix speaker output connectors.


  • Designation: Microphone (mixer inputs), Auxiliary, Sound Reinforcement
  • Number of inputs: 4 per unit
  • Phantom: User selectable: 3V, 24V or none (for Line inputs)
  • Connectors: XLR
  • Input Impedance (load):
  • 3V Phantom: 2K ohm
  • 24V Phantom: 590 Ohm
  • No Phantom: 2K ohm
  • Maximum input level: 1.8V/Gain
  • Gain: User selectable: 0dB to 42dB in 6dB steps
  • Frequency response: 20 Hz – 16 KHz

Audio Out

  • Connectors: RCA and XLR (the XLR is re-assigned as Link Up when the unit is configured as Slave)
  • Level: Line or Mic level (user selectable)
  • For Line level: 1.8Vpp Max
  • For Mic level: 90mVpp Max
  • Link Up level: Line (1.8Vpp fixed)
  • Impedance: 25 ohm
  • Frequency response: 20 Hz – 16 KHz
  • Audio (Far-End) In
  • Connector: RCA
  • Impedance: 100K ohm
  • Level: 1.8Vpp
Far-End (Speaker) out

  • Connector: 2pin terminal block
  • Impedance: 25 ohm
  • Level: 1.8Vpp Max
  • Com Port
  • RS232 – protocol available upon request
  • Power
  • 5V, 200mAmp (through the USB connector)


  • Two Years

Octopus MT454 User Manual

Octopus MT454 Datasheet


The Phoenix Audio Octopus is no longer available for purchase. Click here to view the StingRay MT700.