Duo X Technical Specs

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Technical specs


  • length: 188 mm
  • width: 163 mm
  • height: 63 mm


  • RockChip RK3399 CPU:
    • CPU family: ARM A72 + A53
    • Platform bit depth: 64 bit
    • Cores Clock: 4 x 1.4GHz + 2 x 1.8GHz
    • Memory: 2 GB RAM
    • Flash Storage: 16 GB

Inputs and outputs


MOD Duo X right side view showing the audio and CV inputs.
MOD Duo X left side view showing the audio and headphone/CV outputs.
  • 2x independent audio inputs with:
    • independent multi-stage preamplifiers per channel (+6, +15, +20dB);
    • TS connectors;
    • Input impedance 1 MΩ
    • Programmable Fine Adjust Gain Amplifier: ± 12 dB Gain, 0.5 dB step.
    • 24 bit Digital Audio convertion Bit Depth.
  • 2x independent audio outputs with:
    • TRS noise cancelling;
    • TRS connectors (balanced compatible);
    • Volume Control: 0 to -127 dB, 0.5dB step;
    • 24 bit Digital Audio convertion Bit Depth.
  • Headphone output:
    • 6.35mm TRS connector
    • Digital volume control from +12dB to −33dB
  • SPDIF output:
    • 3.5mm coaxial TS connector (signal on tip port)

Each input/output uses a TRS connector, a True Bypass circuit, and has a LED whose color depends on the audio signal amplitude. Learn more about the Duo LED indicators here and for the Duo X here.

Control Voltage

  • 2 CV input ports
    • Switchable to CV Expression (you can use this input to connect one expression pedal)
    • Stereo 6.35mm TRS connector
  • 2 CV output port
    • Stereo 6.35mm TRS connector


  • On the Duo X Limited edition, both the CV inputs and outputs have a range from 0V to 5V.
  • On the Duo X normal production edition, both the CV inputs and outputs have a range from 0V to 10V.

ADC uses https://www.ti.com/product/ADC122S021 DAC uses https://www.microchip.com/en-us/product/mcp4922

Important Wrong use of the CV ports may damage the MOD Duo X. Please pay special attention.


  • MIDI IN connector - DIN 5 pins
  • MIDI OUT connector - DIN 5 pins


  • USB Host
    • Connector: Type-A
    • Standard: USB 2.0
    • Maximum output current: 500mA
  • USB Device
    • Connector: Type-B
    • Standard: USB 2.0

Device Controller

  • 1x 2.8" LCD display
  • 2x endless knobs
  • 3x performance buttons
  • 8x knobs
  • 4x push buttons switches with color LEDs


The MOD Duo X runs the MOD runs latest Operating System. Support for the MOD Duo X was added to the MOD OS on version 1.7.