GrindR EQ - Boost

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Wanna boost ? 20db of clean boost, with a bypassable (left switch) preamp (bass and treble control). Right toggle let you switch between the original “Grind” or the “33” EQ. This, is a three in one, including the old school popular Integrated Preamp, switchable with the left toggle. In "P" (Preamp) position, Bass and Treble became active. In "B" (Bypass) mode, you only have Level and EQ type control. Power consumption : 21mA Voltage : 9Vdc ONLY, center negative. Anything over 9V will blow the pedal. 2025-09 : New design, same boosting power, with new boxes. Show more