Simble Overdrive Mk2

The Simble Overdrive Mk2 refines the original Dumble-capturing circuit with upgrades from designer Lassi Ukkonen. More headroom, brightness, and openness address requests from players who loved the original but wanted additional clarity.

The circuit uses a TLC2272 op-amp and BAT41 diodes. Four controls: Level sets output, Sensitivity adjusts distortion and compression, Contour shapes tone with unity at noon, and Accent controls the tonal range of distortion and pick attack. Touch sensitivity tracks even light playing dynamics.

Input impedance 430K, output 50K ohms. Current draw is approximately 10mA. Runs on 9-12V. True bypass switching. Designed in Finland, manufactured in Taiwan under license.