EarthQuaker Devices Gray Channel Overdrive Pedal


The EarthQuaker Devices Gray Channel is an incredibly powerful dual overdrive pedal that goes from a light clean boost all the way up to saturated high gain heaven. Using two channels and 6 different modes that can take you between many different types of overdrive the Gray Channel is a great option.

The Controls

On the front of the pedal you have two footswitches, one that turns the pedal on and off and another that switches the channel. Then above that the pedal mirrors itself with Level and Gain knobs as well as a 3 way switch on each side. The Left side is the green channel that goes between a clean boost to mid/high gain crunch similar to a legendary old grey overdrive pedal you may have tried. The right side is for the higher gain channel that again has a clean boost option but its designed for more saturated tones overall.

6 Different Modes

When on the green channel you have three different clipping options. Si which is for a silicon transistor for a heavy fuzzy tone, Ge for a germanium transistor and a much smoother, fatter overall sound. Finally on the green side you have N mode which has no clipping transistor meaning it works like a clean boost until you start clipping the op amp near the higher end of the gain control.

The red channel also has three different clipping options with a really dynamic LED transistor that cleans up beautifully and an MOSFET or 'FET' transistor which is the ultimate in highly saturated amp like overdrive. Again on the red side you have an option for no clipping mode giving you the same clean boost functionality as the green channel.

Here's what EarthQuaker say about the Gray Channel Overdrive

The Gray Channel is a real "twofer" of an overdrive. It is based around a classic hard-clipping gray box overdrive (subtle hint, huh), one of my all-time favorites. Coincidentally, this is the very same pedal that got me started building pedals and launched EQD. It is two channels of a simple hard clipping overdrive that leaves the character of the guitar and amp intact. The Gray Channel retains the classic warm overdrive sound and expands upon it with several clipping options and bigger bass response. Each channel has 3 clipping modes. The Green channel- "Si" (Silicon clipping diodes), "Ge" (Germanium clipping diodes) and "N" (no clipping diodes). The "Si" mode will be bright/loud/fuzzy and has a natural tube type break up. "Ge" mode is a little looser with more lows and warmth and less output. "N" mode acts as a clean boost until you hit roughly 1 o'clock on the gain, at which point it'll start to saturate the op amp into a biting, loud distortion. Phew! Still with me- Cool, onto the modes of the Red channel. Here, you've got "LED" (LED clipping diodes), "FET" (Mosfet clipping diodes) and "N" (again, no clipping diodes). "LED" mode is the loudest, cleanest and most touch sensitive/least compressed. "Mos" mode is the most compressed with a tighter crunch; the biggest hesher of the group. And finally, the "N" mode is the same clean to crazy loud op amp distortion set-up as the Green channel. With a couple of switch clicks you can go from your bypassed tone to warm break up to over-the-top gnarly grind and any/every combination in between. With more and more drive pedals moving onto already crowded pedal boards, having the Gray Channel dual overdrive is like, totally crucial for sonic growth and sustain. Join the fight to stop pedal board overcrowding, because before we can overdrive tomorrow, we must first drive today... or something. Each Gray Channel is built one at a time, part by gorgeous part at a former automotive paint factory by a bunch of smokestacks on a dead end street in Akron, Ohio.

This device is true bypass and uses relay based "soft touch" switching. Audio will not pass without power.


  • Channel Switch: Selects between Red and Green channels
  • Activate Switch: Turns the effect on and off

Green Controls

  • Gain: Adjusts the drive, dirtier clockwise, cleaner counterclockwise
  • Green: Sets the output level when the green LED is lit.
  • Toggle: "Si"- Silicon clipping, "N"- No clipping, "Ge"- Germanium Clipping

Red Controls

  • Gain: Adjusts the drive, dirtier clockwise, cleaner counterclockwise
  • Red: Sets the output level when the red LED is lit.
  • Toggle: "LED- LED clipping, "N"- No clipping, "FET"- Mosfet Clipping


  • Please use a standard 9 volt DC power supply intended for musical instruments with a negative center 2.1mm barrel or a 9v Battery.
  • Current Draw: 14ma
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