This pedal CAN RUN ON 9 AND 18 VOLTS. Now that we’ve addressed that, let’s talk about some of the characteristics of this pedal. This pedal has a purposeful EQ shift that puts it squarely in the “tweed” type tonal range. At 9 volts, it compresses slightly, like the big box tweed amps do, but still has some stiffness to it, just like those wonderful tone boxes did. At 18 volts, this beauty has increased headroom, AND becomes a bit more stiff, in a lovely way. The Tomahawk is a touch sensitive, dynamic recreation of this classic sound that has a natural and instantly familiar drive texture found on classic albums from so many genres. Grab a tomahawk and add this classic American tone to your tonal palette.