The M Pedals Colossus Overdrive Dumbleit is an overdrive pedal that recreates the tones of classic amplifiers designed and built by Howard Alexander Dumble, the amp builder whose original designs have become, in Pedal of the Day's words, basically unobtainable. The reviewer found the pedal "has a ton of range, a ton of tone and is a fitting tribute to what have now become basically unobtainable amplifiers."1
Controls and clipping modes
The Colossus pairs a Tone control with a PRS (Presence) control, and Pedal of the Day notes that "The Tone & PRS (Presence) controls work together, to help you sculpt and shape your tone to perfection."1
| Control | What it does |
|---|---|
| Tone | Works with the PRS control to sculpt and shape tone1 |
| PRS (Presence) | Works with the Tone control to sculpt and shape tone1 |
| Gain | Overall gain control, affected by the clipping modes1 |
| Clipping switch | Changes between two different clipping modes1 |
The clipping switch gives two distinct characters:
- Right position: a more open and grainy sound1
- Left position: a more compressed sound with more sustain1
How it is built
Pedal of the Day reports that each M Pedals unit is designed and built from scratch, and that the maker even manufactures its own PCBs.1
Videos
Pedal of the Day
BUSCADORES DEL BUEN TONO by AlberTone
BUSCADORES DEL BUEN TONO by AlberTone
Questions
What amps is the M Pedals Colossus Overdrive based on?
Pedal of the Day describes the Colossus as an overdrive pedal that recreates the tones of classic amplifiers designed and built by Howard Alexander Dumble. The reviewer called it a fitting tribute to what have now become basically unobtainable amplifiers, since original Dumble amps are rarely available to players.
What does the clipping switch do on the Colossus?
The Colossus has a switch that changes between two different clipping modes, and these modes affect the overall gain control. Pedal of the Day describes the right position as a more open and grainy sound, and the left position as a more compressed sound with more sustain.
Does the M Pedals Colossus have a presence control?
Yes. The pedal carries a Tone control and a PRS (Presence) control, and Pedal of the Day notes that the two work together to help sculpt and shape tone.
Does M Pedals make its own circuit boards for the Colossus?
According to Pedal of the Day, each M Pedals unit is designed and built from scratch, and the maker even manufactures its own PCBs.
Sources (1)
- M Pedals Colossus Overdrive Dumbleit, Pedal of the Day, 2026-01-04