A note about the pedal's condition:

This pre-owned 2025 Mad Professor Royal Blue shows minor signs of use.

The pedal works perfectly and comes with its original box and accessories.

Touch-Sensitive Tone Sculpting.

The Royal Blue Overdrive is a dynamic and highly responsive drive pedal designed to enhance—not mask—your core tone. Whether you need light breakup, edge-of-clean crunch, or harmonically rich overdrive, the Royal Blue delivers with clarity, articulation, and nuance.

Thanks to its transparent gain structure and active EQ section, the Royal Blue works just as well as a tone-shaping tool as it does a drive pedal. At its lowest gain setting, it functions as an EQ/boost; at higher settings, it responds like a great tube amp—tightening up when you dig in and cleaning up when you ease off.

A pair of active Treble and Bass controls lets you dial in anything from a vintage mid-hump to a scooped modern tone, making it easy to match the pedal to your amp or guitar. Whether you're stacking it into another overdrive or running it into a clean amp, the Royal Blue remains articulate, open, and deeply musical.

Mad Professor Royal Blue Overdrive Features

• Transparent overdrive with exceptional touch sensitivity

• Distortion control works interactively with picking dynamics and guitar volume

• Active 2-band EQ for sculpting low and high frequencies

• Can be used as a clean boost, tone enhancer, or full-range drive

• True bypass switching

• Designed in Finland by Mad Professor

• Power: 9-12V DC (3.5 mA)