MOD Logo
Beta phase in progress

Before our peripherals are available for purchase, we collect real feedback on real-life functionality.
This means that the first batch of footswitch extensions is available to MOD Duo enthusiasts.
The enthusiasts give us feedback in return, allowing us to make the best possible device for you!

Description and Features

  • Modular and Programmable Expansion of the MOD Duo
  • Visual Information for Maximum Control
  • Compact and Robust Design
  • Upgradeable Firmware
  • Open Software and Open Hardware
  • Beta Tested for Improved User Experience


The XF4 seamlessly connects to your MOD Duo and is instantly recognized on the Pedalboard Builder to extend the actuators you can use to control your effects. Like the MOD Duo’s own footswitches, it allows you to scroll through lists, toggle effects on and off and also define tap tempos.

It can be anything you want it to be: you can use it as a single functional controller (and map your SooperLooper for instance) or address different effects to it. Each saved pedalboard can have it configured in a specific way for added versatility on stage. And if you want more controls, you can daisy chain it with another XF4 or other Control Chain Device.


Keep track of your configurations thanks to the two LCD screens on your XF4. This allows you to know exactly what effects are assigned at all times and comes in handy on stage when shifting through pedalboards. Each footswitch also has its own LED to indicate if the footswitch is being used or not, whether the effect it’s addressed to is on/off and more.


The XF4 was designed to sustain all the rigors of the stage yet be lightweight and small. Its sleek design matches the MOD Duo and its compactness ensures a minimal footprint.


Like all products of the MOD ecosystem, the XF4 is meant to last and evolve with time. As new functionalities are developed, you will be able to easily upgrade its firmware and take full advantage of the powerful processor inside.


In tune with MOD Devices disruptive philosophy, both the software and hardware of the XF4 are open-source. This means many things but, first and foremost, that we want our users to empower themselves and be able to use our products in the way they see fit. The XF4 can easily be hacked and tweaked, and users can even build one themselves.


The XF4 are currently undergoing a Beta Testing in order to collect feedback from early users, correct any firmware or hardware issues and enhance the overall user experience with community-sourced features. This tried and true method for product releases has allowed us to sustain the high quality standard we work for here at MOD Devices and tailor our products to our community’s needs.

Technical Specifications

  • ARM Cortex-M0
  • 2 Character LCDs 16x2
  • 4 footswitches with LEDs
  • USB - Mini B entry 
    • Used to upgrade the firmware
  • Control Chain
    • RS-485 (TIA/EIA-485) Standard - Full duplex
    • 2 RJ45 connectors
    • Power over Ethernet cable
  • Aluminum enclosure
  • Low profile design
  • Dimensions and weight
    • Width: 280mm
    • Length: 87mm
    • Height: 46mm
    • Weight: 0.5kg

Control Chain Devices

Control Chain is an open standard, including hardware, communication protocol, cables and connectors, developed to connect external controllers to the MOD. For example, footswitch extensions, expression pedals and so on.

Comparing to MIDI, Control Chain is way more powerful. For example, instead of using hard-coded values as MIDI does, Control Chain has what is called device descriptor and its assignment (or mapping) message contains the full information about the parameter being assigned, such as parameter name, absolute value, range and any other data. Having all that information on the device side allows developers to create powerful peripherals that can, for example, show the absolute parameter value on a display, use different LED colors to indicate a specific state, etc. Pretty neat, right?

And remember: you can daisy chain up to 4 Control Chain peripherals to your MOD Duo!

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