EarthQuaker Devices Gray Channel OPERATION MANUAL

Hey dude! Welcome to your new dynamic dirt doubler! 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.

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

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

Power: Please use a standard 9 volt DC power supply intended for musical instruments with
a negative cen

ter 2.1mm barrel or a 9v Battery.

Current Draw: 14ma

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