The Expanse controls
Expression jacks
Separate jacks let you simultaneously control WIDTH and either EXPANSE or VELOCITY with any expression pedal, including the Expanse-themed expression slider, or the regular MAS Effects Desktop Expression Pedal.
Sweeping range of the tremolo (on bottom 2 OUTER SPACE settings)
or Spacing between echoes (on upper OUTER SPACE setting)
Speed of tremolo sweep
Amount of atmospheric ambience
VASTNESS (Unlabeled upper-right knob)
Amount of space added when pressing the VAST EXPANSE foot switch
(Interactive with EXPANSE. e.g. Higher EXPANSE settings make this more responsive. Experiment to get a feel for it)
Overall effect level. Gives up to 2x boost to compensate for the perceived drop in volume from tremolo
Mixes dry and wet signals
Sets the mode of the pedal:
  • DOWN: Harmonic tremolo only. EXPANSE is disabled
  • MID: Adds expansive reverb
  • UP: Adds echoing feedback
Selects between different voices:
  • DOWN: Sensible and beautiful harmonic tremolo
  • MID: Slightly more severe, with different frequencies on the high and low pass filters, and more resonance
  • UP: The low frequency oscillator (LFO) not only pans between the filters, but also shifts their frequencies. The WIDTH knob has a much bigger impact on the sound than in other WARP settings as it also shifts the resonance
VAST EXPANSE (foot switch)
Temporarily pushes the EXPANSE beyond EXPANSE its limits. Its added amount is controlled by VASTNESS
BYPASS (foot switch)
Tap to toggle between engaged and bypassed (true bypass). Hold to temporarily toggle, the release to switch back
Internal Trimmers

An internal trimmer sets the ceiling of the EXPANSE knob.
Another sets the LED brightness, which can reduce power consumption if needed.

Favorite Settings

Coming Soon

Technical Specifications

Power supply
9V DC, 2.1mm center negative (not included). No internal battery clip.
Power consumption
70mA to 110mA depending on LED brightness, set with an internal trimmer. By default it's around 100mA and you can safely plug it into a 100mA port on a multi-port power supply.
True bypass, relay controlled with a soft-touch switch. Hold to temporarily engage/bypass.
In / Out Jacks
1/4" mono (TS)
Expression Jacks
1/4" stereo (TRS)
94x118mm footprint (3.7" x 4.65"), 60mm tall including knobs (2.36")


The Expanse, like all MAS Effects pedals, is covered by a generous Forever Warranty. Follow this link for details.

Desktop Expression Slider

[limited edition]

We've also made a limited number of Expanse-themed versions of our popular expression slider.

It makes a great companion to The Expanse.

Your Content!

Send in your audio, video clips, or pics and we'll post them here. Let everyone see and hear what you're doing with The Expanse