Legendary Transparency. Elevated.

The Simble Overdrive MK2 is a refined evolution of one of Mad Professor’s most iconic circuits—developed in collaboration with original designer Lassi Ukkonen. Celebrated for its dynamic response and organic feel, the Simble captures the nuance of your playing while preserving the soul of your instrument.

From crystal-clear boost to edge-of-breakup textures and rich, vocal-like overdrive, the MK2 delivers a wide palette of tones that feel alive under your fingers. The updated circuit offers increased headroom, improved clarity, and a more open voicing—making it even more versatile and expressive, whether you’re pairing it with a Strat, a Les Paul, or anything in between.

Whether you're chasing Dumble-style tones or simply want a pedal that feels like an extension of your amp, the Simble MK2 delivers—with elegance, depth, and just the right amount of attitude.

Mad Professor Simble Overdrive MK2 Features

• Transparent overdrive with wide dynamic range

• Works beautifully as a clean boost, edge-of-breakup crunch, or rich overdrive

• Updated design offers more headroom and tonal openness

• Contour control now responds more effectively across a range of instruments

• Designed in Finland by Mad Professor & Lassi Ukkonen

• True bypass switching

• Power: 9-12V DC (10 mA)